Dave Hagman created HUDI-2549: --------------------------------- Summary: Exceptions when using second writer into Hudi table managed by DeltaStreamer Key: HUDI-2549 URL: https://issues.apache.org/jira/browse/HUDI-2549 Project: Apache Hudi Issue Type: Bug Components: DeltaStreamer, Spark Integration, Writer Core Reporter: Dave Hagman Assignee: Dave Hagman Fix For: 0.10.0
When running the DeltaStreamer along with a second spark datasource writer (with [ZK-based OCC enabled|https://hudi.apache.org/docs/concurrency_control#enabling-multi-writing] we receive the following exception (which haults the spark datasource writer). This occurs following warnings of timeline inconsistencies: {code:java} 21/10/07 17:10:05 INFO TransactionManager: Transaction ending with transaction owner Option{val=[==>20211007170717__commit__INFLIGHT]} 21/10/07 17:10:05 INFO ZookeeperBasedLockProvider: RELEASING lock atZkBasePath = /events/test/mwc/v1, lock key = events_mwc_test_v1 21/10/07 17:10:05 INFO ZookeeperBasedLockProvider: RELEASED lock atZkBasePath = /events/test/mwc/v1, lock key = events_mwc_test_v1 21/10/07 17:10:05 INFO TransactionManager: Transaction ended Exception in thread "main" java.lang.IllegalArgumentException at org.apache.hudi.common.util.ValidationUtils.checkArgument(ValidationUtils.java:31) at org.apache.hudi.common.table.timeline.HoodieActiveTimeline.transitionState(HoodieActiveTimeline.java:414) at org.apache.hudi.common.table.timeline.HoodieActiveTimeline.transitionState(HoodieActiveTimeline.java:395) at org.apache.hudi.common.table.timeline.HoodieActiveTimeline.saveAsComplete(HoodieActiveTimeline.java:153) at org.apache.hudi.client.AbstractHoodieWriteClient.commit(AbstractHoodieWriteClient.java:218) at org.apache.hudi.client.AbstractHoodieWriteClient.commitStats(AbstractHoodieWriteClient.java:190) at org.apache.hudi.client.SparkRDDWriteClient.commit(SparkRDDWriteClient.java:124) at org.apache.hudi.HoodieSparkSqlWriter$.commitAndPerformPostOperations(HoodieSparkSqlWriter.scala:617) at org.apache.hudi.HoodieSparkSqlWriter$.write(HoodieSparkSqlWriter.scala:274) at org.apache.hudi.DefaultSource.createRelation(DefaultSource.scala:164) at org.apache.spark.sql.execution.datasources.SaveIntoDataSourceCommand.run(SaveIntoDataSourceCommand.scala:46) at org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult$lzycompute(commands.scala:70) at org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult(commands.scala:68) at org.apache.spark.sql.execution.command.ExecutedCommandExec.doExecute(commands.scala:90) at org.apache.spark.sql.execution.SparkPlan.$anonfun$execute$1(SparkPlan.scala:185) at org.apache.spark.sql.execution.SparkPlan.$anonfun$executeQuery$1(SparkPlan.scala:223) at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151) at org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:220) at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:181) at org.apache.spark.sql.execution.QueryExecution.toRdd$lzycompute(QueryExecution.scala:134) at org.apache.spark.sql.execution.QueryExecution.toRdd(QueryExecution.scala:133) at org.apache.spark.sql.DataFrameWriter.$anonfun$runCommand$1(DataFrameWriter.scala:989) at org.apache.spark.sql.catalyst.QueryPlanningTracker$.withTracker(QueryPlanningTracker.scala:107) at org.apache.spark.sql.execution.SQLExecution$.withTracker(SQLExecution.scala:232) at org.apache.spark.sql.execution.SQLExecution$.executeQuery$1(SQLExecution.scala:110) at org.apache.spark.sql.execution.SQLExecution$.$anonfun$withNewExecutionId$6(SQLExecution.scala:135) at org.apache.spark.sql.catalyst.QueryPlanningTracker$.withTracker(QueryPlanningTracker.scala:107) at org.apache.spark.sql.execution.SQLExecution$.withTracker(SQLExecution.scala:232) at org.apache.spark.sql.execution.SQLExecution$.$anonfun$withNewExecutionId$5(SQLExecution.scala:135) at org.apache.spark.sql.execution.SQLExecution$.withSQLConfPropagated(SQLExecution.scala:253) at org.apache.spark.sql.execution.SQLExecution$.$anonfun$withNewExecutionId$1(SQLExecution.scala:134) at org.apache.spark.sql.SparkSession.withActive(SparkSession.scala:772) at org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:68) at org.apache.spark.sql.DataFrameWriter.runCommand(DataFrameWriter.scala:989) at org.apache.spark.sql.DataFrameWriter.saveToV1Source(DataFrameWriter.scala:438) at org.apache.spark.sql.DataFrameWriter.saveInternal(DataFrameWriter.scala:415) at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:293) {code} The validation at _*ValidationUtils.checkArgument*_ fails because the expected commit file was not present on DFS. The test setup is this: * Deltastreamer, continuous mode. Small batch sizes and very fast commit times (high commit rate, every 10-30 seconds) * A spark datasource writer moving flat parquet files from a source bucket into the table maintained by the deltastreamer * The spark datasource is much slower than the deltastreamer so time-to-first-commit is about 2-8 minutes What I see happen is the deltastreamer finalizing many commits while the spark datasource is performing its write. It appears that the timeline changes so much, so fast that the spark datasource writer becomes "out of sync" in ways that it cannot recover. I see the {{Exception in thread "main" java.lang.IllegalArgumentException}} error on the first commit of the *datasource writer* every time. This appears to be a race condition when the rate-of-change of the hudi timeline is very high (due to a fast deltastreamer process). The spark datasource does not properly sync those changes in a multi-writer configuration which causes enough inconsistency to crash the job. -- This message was sent by Atlassian Jira (v8.3.4#803005)