Hi 我最近在处理幂等性写入Mysql 但相关文档太少并没有实质性的操作, 所有方便参观下你这边实务写入的code吗? 非常感谢你
也可发code到我的email 15701181132mr....@gmail.com😀
1101300123 <hdxg1101300...@163.com> 于2020年4月10日周五 上午11:42写道：
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> 目前使用flink处理kafka数据后sink到mysql，处理完的数据是一个用户ID对应多条记录，都要插入到mysql，所以在sink中会循环list把数据组装成batch提交，所以mysql开启了事务保证一批数据的事务。现在发现程序运行几个小时候会出现mysql死锁！想了解一下大家是怎么处理sink端
> 多条记录的操作
> sink的invoke代码
> @Override
> public void invoke(Tuple5<String, String, String, String,
> List<BroadBandReq>> value, Context context) throws Exception {
> connection.setAutoCommit(false);
> List<BroadBandReq> f4 = value.f4;
> for (BroadBandReq rs: f4){
> statement.setString(1,rs.getUserId());
> statement.setString(2,rs.getPhoneNum());
> statement.setString(3,rs.getProvId());
> statement.addBatch();
> }
> try {
> statement.executeBatch();
> connection.commit();
> }catch (Exception e){
> LOG.info(" add data for rds ; operTag:{},
> userId:{},removeTag:{},stateCode:{}, phoneList:{}", value.f0, value.f1,
> value.f2, value.f3,f4);
> connection.rollback();
> e.printStackTrace();
> throw new Exception(e);
> }
> }
>
>
>
>
> java.lang.Exception: java.sql.BatchUpdateException: Deadlock found when
> trying to get lock; try restarting transaction
> at com.mycom.ogg.RdsOperaterSink.invoke(RdsOperaterSink.java:73)
> at com.mycom.ogg.RdsOperaterSink.invoke(RdsOperaterSink.java:18)
> at
> org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:56)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:641)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:616)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:596)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:730)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:708)
> at
> org.apache.flink.streaming.api.operators.StreamFilter.processElement(StreamFilter.java:40)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:641)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:627)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:718)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:736)
> at
> org.apache.flink.streaming.api.operators.ProcessOperator$ContextImpl.output(ProcessOperator.java:102)
> at
> com.unicom.ogg.ExtractOggApplicationV2$6.processElement(ExtractOggApplicationV2.java:162)
> at
> com.unicom.ogg.ExtractOggApplicationV2$6.processElement(ExtractOggApplicationV2.java:157)
> at
> org.apache.flink.streaming.api.operators.ProcessOperator.processElement(ProcessOperator.java:66)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:641)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:616)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:596)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:730)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:708)
> at
> org.apache.flink.streaming.api.operators.StreamFilter.processElement(StreamFilter.java:40)
> at
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:173)
> at org.apache.flink.streaming.runtime.io
> .StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:151)
> at org.apache.flink.streaming.runtime.io
> .StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:128)
> at org.apache.flink.streaming.runtime.io
> .StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:69)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:311)
> at
> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:187)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:487)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:470)
> at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:707)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:532)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.sql.BatchUpdateException: Deadlock found when trying to
> get lock; try restarting transaction
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
> at com.mysql.jdbc.Util.getInstance(Util.java:408)
> at
> com.mysql.jdbc.SQLError.createBatchUpdateException(SQLError.java:1163)
> at
> com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:1772)
> at
> com.mysql.jdbc.PreparedStatement.executeBatchInternal(PreparedStatement.java:1262)
> at
> com.mysql.jdbc.StatementImpl.executeBatch(StatementImpl.java:970)
> at com.mycom.ogg.RdsOperaterSink.invoke(RdsOperaterSink.java:67)
> ... 33 more
> Caused by:
> com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock
> found when trying to get lock; try restarting transaction
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
> at com.mysql.jdbc.Util.getInstance(Util.java:408)
> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:952)
> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3976)
> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3912)
> at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2530)
> at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2683)
> at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2486)
> at
> com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858)
> at
> com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2079)
> at
> com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:1756)
> ... 36 more
> [flink-akka.actor.default-dispatcher-783]
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