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https://issues.apache.org/jira/browse/SQOOP-2151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14542084#comment-14542084
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Gwen Shapira commented on SQOOP-2151:
-------------------------------------
Went over the patch with Ted and I agree it resolves an issue and will commit
it shortly.
We don't know if it resolves Jarcec's specific problem since we did not manage
to reproduce it.
I'll also open two follow up JIRA:
1. Add tests for the situation where the mapper throws an exception.
2. Move from the current simple producer-consumer model with a single in-flight
record to an actual buffer.
> Sqoop2: Sqoop mapreduce job gets into deadlock when loader throws an exception
> ------------------------------------------------------------------------------
>
> Key: SQOOP-2151
> URL: https://issues.apache.org/jira/browse/SQOOP-2151
> Project: Sqoop
> Issue Type: Bug
> Affects Versions: 1.99.5
> Reporter: Jarek Jarcec Cecho
> Assignee: Ted Malaska
> Priority: Blocker
> Fix For: 2.0.0
>
> Attachments: SQOOP-2151.patch
>
>
> I'm working on Kite integration tests and I've noticed that there is certain
> case where Sqoop mapreduce job gets into deadlock.
> I've get there by running Kite job after upgrading to Kite 1.0 but before
> fixing the temporary data set problem covered by SQOOP-2150. Here is the log
> output from mapper:
> {code}
> 2015-02-28 09:14:50,994 [OutputFormatLoader-consumer] INFO
> org.apache.sqoop.job.mr.SqoopOutputFormatLoadExecutor -
> SqoopOutputFormatLoadExecutor consumer thread is starting
> 2015-02-28 09:14:51,021 [OutputFormatLoader-consumer] INFO
> org.apache.sqoop.job.mr.SqoopOutputFormatLoadExecutor - Running loader class
> org.apache.sqoop.connector.kite.KiteLoader
> 2015-02-28 09:14:51,025 [main] INFO org.apache.sqoop.job.mr.SqoopMapper -
> Starting progress service
> 2015-02-28 09:14:51,030 [main] INFO org.apache.sqoop.job.mr.SqoopMapper -
> Running extractor class org.apache.sqoop.connector.jdbc.GenericJdbcExtractor
> 2015-02-28 09:14:51,306 [main] INFO
> org.apache.sqoop.connector.jdbc.GenericJdbcExtractor - Using query: SELECT *
> FROM FROMRDBMSTOKITETEST WHERE 1 <= "id" AND "id" <= 4
> 2015-02-28 09:14:51,627 [OutputFormatLoader-consumer] ERROR
> org.apache.sqoop.job.mr.SqoopOutputFormatLoadExecutor - Error while loading
> data out of MR job.
> org.kitesdk.data.ValidationException: Dataset name
> temp_9975e79a-7e5d-493a-b6d4-646f3452a51f is not alphanumeric (plus '_')
> at
> org.kitesdk.data.ValidationException.check(ValidationException.java:55)
> at
> org.kitesdk.data.spi.Compatibility.checkDatasetName(Compatibility.java:103)
> at org.kitesdk.data.spi.Compatibility.check(Compatibility.java:66)
> at
> org.kitesdk.data.spi.filesystem.FileSystemMetadataProvider.create(FileSystemMetadataProvider.java:209)
> at
> org.kitesdk.data.spi.filesystem.FileSystemDatasetRepository.create(FileSystemDatasetRepository.java:137)
> at org.kitesdk.data.Datasets.create(Datasets.java:239)
> at org.kitesdk.data.Datasets.create(Datasets.java:307)
> at org.kitesdk.data.Datasets.create(Datasets.java:335)
> at
> org.apache.sqoop.connector.kite.KiteDatasetExecutor.createDataset(KiteDatasetExecutor.java:67)
> at
> org.apache.sqoop.connector.kite.KiteLoader.getExecutor(KiteLoader.java:51)
> at org.apache.sqoop.connector.kite.KiteLoader.load(KiteLoader.java:61)
> at org.apache.sqoop.connector.kite.KiteLoader.load(KiteLoader.java:36)
> at
> org.apache.sqoop.job.mr.SqoopOutputFormatLoadExecutor$ConsumerThread.run(SqoopOutputFormatLoadExecutor.java:250)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> 2015-02-28 09:14:51,633 [main] INFO org.apache.sqoop.job.mr.SqoopMapper -
> Stopping progress service
> 2015-02-28 09:14:51,634 [main] INFO
> org.apache.sqoop.job.mr.SqoopOutputFormatLoadExecutor -
> SqoopOutputFormatLoadExecutor::SqoopRecordWriter is about to be closed
> {code}
> But the mapper never finished, here is the relevant jstack:
> {code}
> "main" #1 prio=5 os_prio=31 tid=0x00007fedf180a800 nid=0xc07 waiting on
> condition [0x000000010b3f2000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x0000000127399b50> (a
> java.util.concurrent.Semaphore$FairSync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
> at java.util.concurrent.Semaphore.acquire(Semaphore.java:312)
> at
> org.apache.sqoop.job.mr.SqoopOutputFormatLoadExecutor$SqoopRecordWriter.close(SqoopOutputFormatLoadExecutor.java:113)
> at
> org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.close(MapTask.java:667)
> at org.apache.hadoop.mapred.MapTask.closeQuietly(MapTask.java:2012)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:794)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
> {code}
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