[TEPHRA-239] Null pointer exception in TransactionStateCache

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.13.0-incubating
• Assignee: Gokul Gunasekaran
• Reporter: Samarth Jain
• Created: 20/Jul/17 01:11
• Updated: 11/Sep/17 18:20
• Resolved: 11/Sep/17 18:20

Description

In our Phoenix test runs we have seen the following NPE in TransactionStateCache.

2017-07-19 18:57:56,136 INFO  [tx-state-refresh] org.apache.tephra.coprocessor.TransactionStateCache$1(144): Exiting thread tx-state-refresh
2017-07-19 18:57:56,138 ERROR [TransactionStateCache STOPPING] org.apache.zookeeper.server.NIOServerCnxnFactory$1(44): Thread Thread[TransactionStateCache STOPPING,5,main] died
java.lang.NullPointerException
	at org.apache.tephra.coprocessor.TransactionStateCache.shutDown(TransactionStateCache.java:85)
	at com.google.common.util.concurrent.AbstractIdleService$1$2.run(AbstractIdleService.java:57)
	at java.lang.Thread.run(Thread.java:745)
2017-07-19 18:57:56,138 WARN  [RS_CLOSE_REGION-pietas:52618-2] org.apache.tephra.coprocessor.ReferenceCountedSupplier(89): Exception while trying to stop Service TransactionStateCache.
com.google.common.util.concurrent.UncheckedExecutionException: java.lang.NullPointerException
	at com.google.common.util.concurrent.Futures.wrapAndThrowUnchecked(Futures.java:1015)
	at com.google.common.util.concurrent.Futures.getUnchecked(Futures.java:1001)
	at com.google.common.util.concurrent.AbstractService.stopAndWait(AbstractService.java:225)
	at com.google.common.util.concurrent.AbstractIdleService.stopAndWait(AbstractIdleService.java:122)
	at org.apache.tephra.coprocessor.ReferenceCountedSupplier.release(ReferenceCountedSupplier.java:86)
	at org.apache.tephra.coprocessor.TransactionStateCacheSupplier.release(TransactionStateCacheSupplier.java:61)
	at org.apache.tephra.hbase.coprocessor.TransactionProcessor.stop(TransactionProcessor.java:182)
	at org.apache.phoenix.coprocessor.DelegateRegionObserver.stop(DelegateRegionObserver.java:82)
	at org.apache.hadoop.hbase.coprocessor.CoprocessorHost$Environment.shutdown(CoprocessorHost.java:433)
	at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$RegionEnvironment.shutdown(RegionCoprocessorHost.java:152)
	at org.apache.hadoop.hbase.coprocessor.CoprocessorHost.shutdown(CoprocessorHost.java:274)
	at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$5.postEnvCall(RegionCoprocessorHost.java:512)
	at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperation(RegionCoprocessorHost.java:1761)
	at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.postClose(RegionCoprocessorHost.java:505)
	at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1542)
	at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1381)
	at org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:138)
	at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:129)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
	at org.apache.tephra.coprocessor.TransactionStateCache.shutDown(TransactionStateCache.java:85)
	at com.google.common.util.concurrent.AbstractIdleService$1$2.run(AbstractIdleService.java:57)
	... 1 more
2017-07-19 18:57:56,139 DEBUG [RS_CLOSE_REGION-pietas:52618-2] org.apache.hadoop.hbase.coprocessor.CoprocessorHost(272): Stop coprocessor org.apache.phoenix.coprocessor.ServerCachingEndpointImpl
2017-07-19 18:57:56,139 DEBUG [RS_CLOSE_REGION-pietas:52618-2] org.apache.hadoop.hbase.coprocessor.CoprocessorHost(272): Stop coprocessor org.apache.phoenix.coprocessor.GroupedAggregateRegionObserver
2017-07-19 18:

Test run: https://builds.apache.org/job/Phoenix-master/1699/testReport/junit/org.apache.phoenix.end2end/ViewIT/testNonSaltedUpdatableViewWithIndex_transactional___false_/

Issue Links

• links to: GitHub Pull Request #46