[ 
https://issues.apache.org/jira/browse/FLINK-21674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17301482#comment-17301482
 ] 

Roman Khachatryan commented on FLINK-21674:
-------------------------------------------

Thanks for the clarification [~fuyaoli]!

> JDBC sink can't get valid connection after 5 minutes using Oracle JDBC driver
> -----------------------------------------------------------------------------
>
>                 Key: FLINK-21674
>                 URL: https://issues.apache.org/jira/browse/FLINK-21674
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / JDBC
>    Affects Versions: 1.12.1
>         Environment: Flink version: 1.12.1 Scala version: 2.11 Java version: 
> 1.11 Flink System parallelism: 1 JDBC Driver: Oracle ojdbc10 Database: Oracle 
> Autonomous Database on Oracle Cloud Infrastructure version 19c(You can regard 
> this as an cloud based Oracle Database)
>  
> Flink user mailing list: 
> http://mail-archives.apache.org/mod_mbox/flink-user/202103.mbox/%3CCH2PR10MB402466373B33A3BBC5635A0AEC8C9%40CH2PR10MB4024.namprd10.prod.outlook.com%3E
>            Reporter: Fuyao
>            Priority: Blocker
>
> I use JDBCSink.sink() method to sink data to Oracle Autonomous Data Warehousr 
> with Oracle JDBC driver. I can sink data into Oracle Autonomous database 
> sucessfully. If there is IDLE time of over 5 minutes, then do a insertion, 
> the retry mechanism can't reestablish the JDBC and it will run into the error 
> below. I have set the retry to be 3 times, even after retry, it will still 
> fail. Only restart the application(an automatic process) could solve the 
> issue from checkpoint.
>  11:41:04,872 ERROR 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat - JDBC 
> executeBatch error, retry times = 0
>  java.sql.BatchUpdateException: IO Error: Broken pipe
> It will fail the application and restart from checkpoint. After restarting 
> from checkpoint, the JDBC connection can be established correctly.
> The connection timeout can be configured by
> alter system set MAX_IDLE_TIME=1440; // Connection will get timeout after 
> 1440 minutes.
> Such timeout parameter behavior change can be verified by SQL developer. 
> However, Flink still got connection error after 5 minutes configuring this.
> I suspect this is some issues in reading some configuration problems from 
> Flink side to establish to sucessful connection.
> Full log:
> {code:java}
> 11:41:04,872 ERROR 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat  - JDBC 
> executeBatch error, retry times = 0
> java.sql.BatchUpdateException: IO Error: Broken pipe
>       at 
> oracle.jdbc.driver.OraclePreparedStatement.executeLargeBatch(OraclePreparedStatement.java:9711)
>       at 
> oracle.jdbc.driver.T4CPreparedStatement.executeLargeBatch(T4CPreparedStatement.java:1447)
>       at 
> oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:9487)
>       at 
> oracle.jdbc.driver.OracleStatementWrapper.executeBatch(OracleStatementWrapper.java:237)
>       at 
> org.apache.flink.connector.jdbc.internal.executor.SimpleBatchStatementExecutor.executeBatch(SimpleBatchStatementExecutor.java:73)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.attemptFlush(JdbcBatchingOutputFormat.java:216)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:184)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.writeRecord(JdbcBatchingOutputFormat.java:167)
>       at 
> org.apache.flink.connector.jdbc.internal.GenericJdbcSinkFunction.invoke(GenericJdbcSinkFunction.java:54)
>       at 
> org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:54)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)
>       at 
> org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:75)
>       at 
> org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:32)
>       at 
> org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50)
>       at 
> org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28)
>       at 
> org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:50)
>       at 
> org.myorg.quickstart.processor.InvoiceBoProcessFunction.onTimer(InvoiceBoProcessFunction.java:613)
>       at 
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.invokeUserFunction(KeyedProcessOperator.java:91)
>       at 
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.onEventTime(KeyedProcessOperator.java:70)
>       at 
> org.apache.flink.streaming.api.operators.InternalTimerServiceImpl.advanceWatermark(InternalTimerServiceImpl.java:302)
>       at 
> org.apache.flink.streaming.api.operators.InternalTimeServiceManagerImpl.advanceWatermark(InternalTimeServiceManagerImpl.java:194)
>       at 
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.processWatermark(AbstractStreamOperator.java:626)
>       at 
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitWatermark(OneInputStreamTask.java:193)
>       at 
> org.apache.flink.streaming.runtime.streamstatus.StatusWatermarkValve.findAndOutputNewMinWatermarkAcrossAlignedChannels(StatusWatermarkValve.java:196)
>       at 
> org.apache.flink.streaming.runtime.streamstatus.StatusWatermarkValve.inputWatermark(StatusWatermarkValve.java:105)
>       at 
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:206)
>       at 
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:174)
>       at 
> org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:395)
>       at 
> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:191)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:609)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:573)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> 11:41:05,725 ERROR 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat  - JDBC 
> connection is not valid, and reestablish connection failed.
> java.sql.SQLRecoverableException: Closed Connection
>       at 
> oracle.jdbc.driver.PhysicalConnection.needLine(PhysicalConnection.java:3525)
>       at 
> oracle.jdbc.driver.OracleStatement.closeOrCache(OracleStatement.java:1478)
>       at oracle.jdbc.driver.OracleStatement.close(OracleStatement.java:1461)
>       at 
> oracle.jdbc.driver.OracleStatementWrapper.close(OracleStatementWrapper.java:122)
>       at 
> oracle.jdbc.driver.OraclePreparedStatementWrapper.close(OraclePreparedStatementWrapper.java:98)
>       at 
> org.apache.flink.connector.jdbc.internal.executor.SimpleBatchStatementExecutor.closeStatements(SimpleBatchStatementExecutor.java:81)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:195)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.writeRecord(JdbcBatchingOutputFormat.java:167)
>       at 
> org.apache.flink.connector.jdbc.internal.GenericJdbcSinkFunction.invoke(GenericJdbcSinkFunction.java:54)
>       at 
> org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:54)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)
>       at 
> org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:75)
>       at 
> org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:32)
>       at 
> org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50)
>       at 
> org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28)
>       at 
> org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:50)
>       at 
> org.myorg.quickstart.processor.InvoiceBoProcessFunction.onTimer(InvoiceBoProcessFunction.java:613)
>       at 
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.invokeUserFunction(KeyedProcessOperator.java:91)
>       at 
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.onEventTime(KeyedProcessOperator.java:70)
>       at 
> org.apache.flink.streaming.api.operators.InternalTimerServiceImpl.advanceWatermark(InternalTimerServiceImpl.java:302)
>       at 
> org.apache.flink.streaming.api.operators.InternalTimeServiceManagerImpl.advanceWatermark(InternalTimeServiceManagerImpl.java:194)
>       at 
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.processWatermark(AbstractStreamOperator.java:626)
>       at 
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitWatermark(OneInputStreamTask.java:193)
>       at 
> org.apache.flink.streaming.runtime.streamstatus.StatusWatermarkValve.findAndOutputNewMinWatermarkAcrossAlignedChannels(StatusWatermarkValve.java:196)
>       at 
> org.apache.flink.streaming.runtime.streamstatus.StatusWatermarkValve.inputWatermark(StatusWatermarkValve.java:105)
>       at 
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:206)
>       at 
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:174)
>       at 
> org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:395)
>       at 
> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:191)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:609)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:573)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> 11:41:05,729 ERROR 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat  - JDBC 
> executeBatch error, retry times = 0
> java.sql.SQLRecoverableException: Closed Connection
>       at 
> oracle.jdbc.driver.OracleStatement.ensureOpen(OracleStatement.java:4204)
>       at 
> oracle.jdbc.driver.OracleStatement.getQueryTimeout(OracleStatement.java:3093)
>       at 
> oracle.jdbc.driver.OracleStatementWrapper.getQueryTimeout(OracleStatementWrapper.java:183)
>       at 
> org.myorg.quickstart.boconstruction.stream.BusinessObjectConstruction.lambda$processFunction$16ee7a3d$1(BusinessObjectConstruction.java:103)
>       at 
> org.apache.flink.connector.jdbc.internal.executor.SimpleBatchStatementExecutor.executeBatch(SimpleBatchStatementExecutor.java:70)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.attemptFlush(JdbcBatchingOutputFormat.java:216)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:184)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.close(JdbcBatchingOutputFormat.java:232)
>       at 
> org.apache.flink.connector.jdbc.internal.GenericJdbcSinkFunction.close(GenericJdbcSinkFunction.java:67)
>       at 
> org.apache.flink.api.common.functions.util.FunctionUtils.closeFunction(FunctionUtils.java:41)
>       at 
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.dispose(AbstractUdfStreamOperator.java:117)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:783)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runAndSuppressThrowable(StreamTask.java:762)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInvoke(StreamTask.java:681)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:585)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> 11:41:05,770 ERROR 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat  - JDBC 
> executeBatch error, retry times = 1
> java.sql.SQLRecoverableException: Closed Connection
>       at 
> oracle.jdbc.driver.OracleStatement.ensureOpen(OracleStatement.java:4204)
>       at 
> oracle.jdbc.driver.OracleStatement.getQueryTimeout(OracleStatement.java:3093)
>       at 
> oracle.jdbc.driver.OracleStatementWrapper.getQueryTimeout(OracleStatementWrapper.java:183)
>       at 
> org.myorg.quickstart.boconstruction.stream.BusinessObjectConstruction.lambda$processFunction$16ee7a3d$1(BusinessObjectConstruction.java:103)
>       at 
> org.apache.flink.connector.jdbc.internal.executor.SimpleBatchStatementExecutor.executeBatch(SimpleBatchStatementExecutor.java:70)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.attemptFlush(JdbcBatchingOutputFormat.java:216)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:184)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.close(JdbcBatchingOutputFormat.java:232)
>       at 
> org.apache.flink.connector.jdbc.internal.GenericJdbcSinkFunction.close(GenericJdbcSinkFunction.java:67)
>       at 
> org.apache.flink.api.common.functions.util.FunctionUtils.closeFunction(FunctionUtils.java:41)
>       at 
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.dispose(AbstractUdfStreamOperator.java:117)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:783)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runAndSuppressThrowable(StreamTask.java:762)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInvoke(StreamTask.java:681)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:585)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> 11:41:06,820 ERROR 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat  - JDBC 
> executeBatch error, retry times = 2
> java.sql.SQLRecoverableException: Closed Connection
>       at 
> oracle.jdbc.driver.OracleStatement.ensureOpen(OracleStatement.java:4204)
>       at 
> oracle.jdbc.driver.OracleStatement.getQueryTimeout(OracleStatement.java:3093)
>       at 
> oracle.jdbc.driver.OracleStatementWrapper.getQueryTimeout(OracleStatementWrapper.java:183)
>       at 
> org.myorg.quickstart.boconstruction.stream.BusinessObjectConstruction.lambda$processFunction$16ee7a3d$1(BusinessObjectConstruction.java:103)
>       at 
> org.apache.flink.connector.jdbc.internal.executor.SimpleBatchStatementExecutor.executeBatch(SimpleBatchStatementExecutor.java:70)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.attemptFlush(JdbcBatchingOutputFormat.java:216)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:184)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.close(JdbcBatchingOutputFormat.java:232)
>       at 
> org.apache.flink.connector.jdbc.internal.GenericJdbcSinkFunction.close(GenericJdbcSinkFunction.java:67)
>       at 
> org.apache.flink.api.common.functions.util.FunctionUtils.closeFunction(FunctionUtils.java:41)
>       at 
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.dispose(AbstractUdfStreamOperator.java:117)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:783)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runAndSuppressThrowable(StreamTask.java:762)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInvoke(StreamTask.java:681)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:585)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> 11:41:08,865 ERROR 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat  - JDBC 
> executeBatch error, retry times = 3
> java.sql.SQLRecoverableException: Closed Connection
>       at 
> oracle.jdbc.driver.OracleStatement.ensureOpen(OracleStatement.java:4204)
>       at 
> oracle.jdbc.driver.OracleStatement.getQueryTimeout(OracleStatement.java:3093)
>       at 
> oracle.jdbc.driver.OracleStatementWrapper.getQueryTimeout(OracleStatementWrapper.java:183)
>       at 
> org.myorg.quickstart.boconstruction.stream.BusinessObjectConstruction.lambda$processFunction$16ee7a3d$1(BusinessObjectConstruction.java:103)
>       at 
> org.apache.flink.connector.jdbc.internal.executor.SimpleBatchStatementExecutor.executeBatch(SimpleBatchStatementExecutor.java:70)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.attemptFlush(JdbcBatchingOutputFormat.java:216)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:184)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.close(JdbcBatchingOutputFormat.java:232)
>       at 
> org.apache.flink.connector.jdbc.internal.GenericJdbcSinkFunction.close(GenericJdbcSinkFunction.java:67)
>       at 
> org.apache.flink.api.common.functions.util.FunctionUtils.closeFunction(FunctionUtils.java:41)
>       at 
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.dispose(AbstractUdfStreamOperator.java:117)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:783)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runAndSuppressThrowable(StreamTask.java:762)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInvoke(StreamTask.java:681)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:585)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> 11:41:08,866 WARN  
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat  - Writing 
> records to JDBC failed.
> java.io.IOException: java.sql.SQLRecoverableException: Closed Connection
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:190)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.close(JdbcBatchingOutputFormat.java:232)
>       at 
> org.apache.flink.connector.jdbc.internal.GenericJdbcSinkFunction.close(GenericJdbcSinkFunction.java:67)
>       at 
> org.apache.flink.api.common.functions.util.FunctionUtils.closeFunction(FunctionUtils.java:41)
>       at 
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.dispose(AbstractUdfStreamOperator.java:117)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:783)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runAndSuppressThrowable(StreamTask.java:762)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInvoke(StreamTask.java:681)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:585)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> Caused by: java.sql.SQLRecoverableException: Closed Connection
>       at 
> oracle.jdbc.driver.OracleStatement.ensureOpen(OracleStatement.java:4204)
>       at 
> oracle.jdbc.driver.OracleStatement.getQueryTimeout(OracleStatement.java:3093)
>       at 
> oracle.jdbc.driver.OracleStatementWrapper.getQueryTimeout(OracleStatementWrapper.java:183)
>       at 
> org.myorg.quickstart.boconstruction.stream.BusinessObjectConstruction.lambda$processFunction$16ee7a3d$1(BusinessObjectConstruction.java:103)
>       at 
> org.apache.flink.connector.jdbc.internal.executor.SimpleBatchStatementExecutor.executeBatch(SimpleBatchStatementExecutor.java:70)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.attemptFlush(JdbcBatchingOutputFormat.java:216)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:184)
>       ... 11 more
> 11:41:08,866 WARN  
> org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer  - Error 
> closing producer.
> java.lang.NoSuchMethodError: 
> org.apache.kafka.clients.producer.KafkaProducer.close(Ljava/time/Duration;)V
>       at 
> org.apache.flink.streaming.connectors.kafka.internals.FlinkKafkaInternalProducer.close(FlinkKafkaInternalProducer.java:172)
>       at 
> org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer.close(FlinkKafkaProducer.java:949)
>       at 
> org.apache.flink.api.common.functions.util.FunctionUtils.closeFunction(FunctionUtils.java:41)
>       at 
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.dispose(AbstractUdfStreamOperator.java:117)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:783)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runAndSuppressThrowable(StreamTask.java:762)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInvoke(StreamTask.java:681)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:585)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> 11:41:08,868 WARN  org.apache.flink.runtime.taskmanager.Task                  
>    - ProcessTableOutput -> (Sink: adwSink, Sink: Print to Std. Out, Sink: 
> invoice-notification, Sink: Print to Std. Out, Sink: header-notification, 
> Sink: Print to Std. Out, Sink: lines-notification, Sink: Print to Std. Out, 
> Sink: distributions-notification) (1/1)#0 (95b16d216f03759f0f0c131ba188b338) 
> switched from RUNNING to FAILED.
> java.io.IOException: Writing records to JDBC failed.
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.writeRecord(JdbcBatchingOutputFormat.java:170)
>       at 
> org.apache.flink.connector.jdbc.internal.GenericJdbcSinkFunction.invoke(GenericJdbcSinkFunction.java:54)
>       at 
> org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:54)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)
>       at 
> org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:75)
>       at 
> org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:32)
>       at 
> org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50)
>       at 
> org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28)
>       at 
> org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:50)
>       at 
> org.myorg.quickstart.processor.InvoiceBoProcessFunction.onTimer(InvoiceBoProcessFunction.java:613)
>       at 
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.invokeUserFunction(KeyedProcessOperator.java:91)
>       at 
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.onEventTime(KeyedProcessOperator.java:70)
>       at 
> org.apache.flink.streaming.api.operators.InternalTimerServiceImpl.advanceWatermark(InternalTimerServiceImpl.java:302)
>       at 
> org.apache.flink.streaming.api.operators.InternalTimeServiceManagerImpl.advanceWatermark(InternalTimeServiceManagerImpl.java:194)
>       at 
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.processWatermark(AbstractStreamOperator.java:626)
>       at 
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitWatermark(OneInputStreamTask.java:193)
>       at 
> org.apache.flink.streaming.runtime.streamstatus.StatusWatermarkValve.findAndOutputNewMinWatermarkAcrossAlignedChannels(StatusWatermarkValve.java:196)
>       at 
> org.apache.flink.streaming.runtime.streamstatus.StatusWatermarkValve.inputWatermark(StatusWatermarkValve.java:105)
>       at 
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:206)
>       at 
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:174)
>       at 
> org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:395)
>       at 
> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:191)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:609)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:573)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> Caused by: java.io.IOException: Reestablish JDBC connection failed
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:202)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.writeRecord(JdbcBatchingOutputFormat.java:167)
>       ... 29 more
> Caused by: java.sql.SQLRecoverableException: Closed Connection
>       at 
> oracle.jdbc.driver.PhysicalConnection.needLine(PhysicalConnection.java:3525)
>       at 
> oracle.jdbc.driver.OracleStatement.closeOrCache(OracleStatement.java:1478)
>       at oracle.jdbc.driver.OracleStatement.close(OracleStatement.java:1461)
>       at 
> oracle.jdbc.driver.OracleStatementWrapper.close(OracleStatementWrapper.java:122)
>       at 
> oracle.jdbc.driver.OraclePreparedStatementWrapper.close(OraclePreparedStatementWrapper.java:98)
>       at 
> org.apache.flink.connector.jdbc.internal.executor.SimpleBatchStatementExecutor.closeStatements(SimpleBatchStatementExecutor.java:81)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:195)
>       ... 30 more
> 11:41:08,869 INFO  org.apache.flink.runtime.taskmanager.Task                  
>    - Freeing task resources for ProcessTableOutput -> (Sink: adwSink, Sink: 
> Print to Std. Out, Sink: invoice-notification, Sink: Print to Std. Out, Sink: 
> header-notification, Sink: Print to Std. Out, Sink: lines-notification, Sink: 
> Print to Std. Out, Sink: distributions-notification) (1/1)#0 
> (95b16d216f03759f0f0c131ba188b338).
> 11:41:08,876 INFO  org.apache.flink.runtime.taskexecutor.TaskExecutor         
>    - Un-registering task and sending final execution state FAILED to 
> JobManager for task ProcessTableOutput -> (Sink: adwSink, Sink: Print to Std. 
> Out, Sink: invoice-notification, Sink: Print to Std. Out, Sink: 
> header-notification, Sink: Print to Std. Out, Sink: lines-notification, Sink: 
> Print to Std. Out, Sink: distributions-notification) (1/1)#0 
> 95b16d216f03759f0f0c131ba188b338.
> 11:41:08,880 INFO  org.apache.flink.runtime.executiongraph.ExecutionGraph     
>    - ProcessTableOutput -> (Sink: adwSink, Sink: Print to Std. Out, Sink: 
> invoice-notification, Sink: Print to Std. Out, Sink: header-notification, 
> Sink: Print to Std. Out, Sink: lines-notification, Sink: Print to Std. Out, 
> Sink: distributions-notification) (1/1) (95b16d216f03759f0f0c131ba188b338) 
> switched from RUNNING to FAILED on ac2c0e70-42f9-4d5d-820a-19f6561a6297 @ 
> localhost (dataPort=-1).
> java.io.IOException: Writing records to JDBC failed.
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.writeRecord(JdbcBatchingOutputFormat.java:170)
>       at 
> org.apache.flink.connector.jdbc.internal.GenericJdbcSinkFunction.invoke(GenericJdbcSinkFunction.java:54)
>       at 
> org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:54)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)
>       at 
> org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)
>       at 
> org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:75)
>       at 
> org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:32)
>       at 
> org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50)
>       at 
> org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28)
>       at 
> org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:50)
>       at 
> org.myorg.quickstart.processor.InvoiceBoProcessFunction.onTimer(InvoiceBoProcessFunction.java:613)
>       at 
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.invokeUserFunction(KeyedProcessOperator.java:91)
>       at 
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.onEventTime(KeyedProcessOperator.java:70)
>       at 
> org.apache.flink.streaming.api.operators.InternalTimerServiceImpl.advanceWatermark(InternalTimerServiceImpl.java:302)
>       at 
> org.apache.flink.streaming.api.operators.InternalTimeServiceManagerImpl.advanceWatermark(InternalTimeServiceManagerImpl.java:194)
>       at 
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.processWatermark(AbstractStreamOperator.java:626)
>       at 
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitWatermark(OneInputStreamTask.java:193)
>       at 
> org.apache.flink.streaming.runtime.streamstatus.StatusWatermarkValve.findAndOutputNewMinWatermarkAcrossAlignedChannels(StatusWatermarkValve.java:196)
>       at 
> org.apache.flink.streaming.runtime.streamstatus.StatusWatermarkValve.inputWatermark(StatusWatermarkValve.java:105)
>       at 
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:206)
>       at 
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:174)
>       at 
> org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:395)
>       at 
> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:191)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:609)
>       at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:573)
>       at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
>       at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
>       at java.base/java.lang.Thread.run(Thread.java:834)
> Caused by: java.io.IOException: Reestablish JDBC connection failed
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:202)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.writeRecord(JdbcBatchingOutputFormat.java:167)
>       ... 29 more
> Caused by: java.sql.SQLRecoverableException: Closed Connection
>       at 
> oracle.jdbc.driver.PhysicalConnection.needLine(PhysicalConnection.java:3525)
>       at 
> oracle.jdbc.driver.OracleStatement.closeOrCache(OracleStatement.java:1478)
>       at oracle.jdbc.driver.OracleStatement.close(OracleStatement.java:1461)
>       at 
> oracle.jdbc.driver.OracleStatementWrapper.close(OracleStatementWrapper.java:122)
>       at 
> oracle.jdbc.driver.OraclePreparedStatementWrapper.close(OraclePreparedStatementWrapper.java:98)
>       at 
> org.apache.flink.connector.jdbc.internal.executor.SimpleBatchStatementExecutor.closeStatements(SimpleBatchStatementExecutor.java:81)
>       at 
> org.apache.flink.connector.jdbc.internal.JdbcBatchingOutputFormat.flush(JdbcBatchingOutputFormat.java:195)
>       ... 30 more
> 11:41:08,886 INFO  
> org.apache.flink.runtime.executiongraph.failover.flip1.RestartPipelinedRegionFailoverStrategy
>   - Calculating tasks to restart to recover the failed task 
> 91f695b4d2df74b06fe58043ee03541f_0.
> 11:41:08,887 INFO  
> org.apache.flink.runtime.executiongraph.failover.flip1.RestartPipelinedRegionFailoverStrategy
>   - 9 tasks should be restarted to recover the failed task 
> 91f695b4d2df74b06fe58043ee03541f_0. 
> {code}



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