[HBASE-17400] TestHRegion#testWritesWhileScanning occasionally hangs in MVCC#.waitForRead()

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Assignee: Unassigned
• Reporter: Ted Yu
• Created: 01/Jan/17 02:43
• Updated: 21/Apr/17 23:22
• Resolved: 21/Apr/17 23:22

Description

Looping TestHRegionWithInMemoryFlush with commit 0e48665641b16cd9b250503696b926a568063654 , I got the following error at iteration #33:

Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 600.163 sec <<< FAILURE! - in org.apache.hadoop.hbase.regionserver.TestHRegionWithInMemoryFlush
org.apache.hadoop.hbase.regionserver.TestHRegionWithInMemoryFlush  Time elapsed: 600.019 sec  <<< ERROR!
org.junit.runners.model.TestTimedOutException: test timed out after 10 minutes
  at java.lang.Object.wait(Native Method)
  at org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl.waitForRead(MultiVersionConcurrencyControl.java:218)
  at org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl.completeAndWait(MultiVersionConcurrencyControl.java:149)
  at org.apache.hadoop.hbase.regionserver.HRegion.getNextSequenceId(HRegion.java:2731)
  at org.apache.hadoop.hbase.regionserver.HRegion.internalPrepareFlushCache(HRegion.java:2446)
  at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2342)
  at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2313)
  at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2303)
  at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1600)
  at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1505)
  at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1455)
  at org.apache.hadoop.hbase.HBaseTestingUtility.closeRegionAndWAL(HBaseTestingUtility.java:374)
  at org.apache.hadoop.hbase.regionserver.TestHRegion.testWritesWhileScanning(TestHRegion.java:3985)

See attached test output for details.