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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11017) TestHRegionBusyWait.testWritesWhileScanning fails frequently in 0.94
Date Thu, 17 Apr 2014 21:57:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13973464#comment-13973464
] 

Lars Hofhansl commented on HBASE-11017:
---------------------------------------

This is what I see in the logs:
{code}
2014-04-17 09:41:02,037 INFO  [pool-1-thread-1] regionserver.HRegion(1776): Finished memstore
flush of ~9.7m/10168960, currentsize=7.0m/7383120 for region testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac.
in 278ms, sequenceid=50, compaction requested=true
2014-04-17 09:41:02,038 INFO  [pool-1-thread-1] regionserver.HRegion(1090): Running extra
flush, 1 (carrying snapshot?) testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac.
2014-04-17 09:41:02,038 DEBUG [pool-1-thread-1] regionserver.HRegion(1636): Started memstore
flush for testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac., current
region memstore size 7.0m
2014-04-17 09:41:02,038 DEBUG [pool-1-thread-1] regionserver.HRegion(1686): Finished snapshotting
testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac., syncing WAL and
waiting on mvcc, flushsize=0
2014-04-17 09:41:02,038 DEBUG [pool-1-thread-1] regionserver.HRegion(1702): Finished snapshotting,
commencing flushing stores
2014-04-17 09:41:02,038 INFO  [pool-1-thread-1] regionserver.HRegion(1776): Finished memstore
flush of ~0.0/0, currentsize=7.0m/7383120 for region testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac.
in 0ms, sequenceid=51, compaction requested=false
2014-04-17 09:41:02,038 INFO  [pool-1-thread-1] regionserver.HRegion(1090): Running extra
flush, 2 (carrying snapshot?) testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac.
2014-04-17 09:41:02,039 DEBUG [pool-1-thread-1] regionserver.HRegion(1636): Started memstore
flush for testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac., current
region memstore size 7.0m
2014-04-17 09:41:02,039 DEBUG [pool-1-thread-1] regionserver.HRegion(1686): Finished snapshotting
testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac., syncing WAL and
waiting on mvcc, flushsize=0
2014-04-17 09:41:02,039 DEBUG [pool-1-thread-1] regionserver.HRegion(1702): Finished snapshotting,
commencing flushing stores
2014-04-17 09:41:02,039 INFO  [pool-1-thread-1] regionserver.HRegion(1776): Finished memstore
flush of ~0.0/0, currentsize=7.0m/7383120 for region testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac.
in 1ms, sequenceid=52, compaction requested=false
2014-04-17 09:41:02,039 INFO  [pool-1-thread-1] regionserver.HRegion(1090): Running extra
flush, 3 (carrying snapshot?) testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac.
2014-04-17 09:41:02,039 DEBUG [pool-1-thread-1] regionserver.HRegion(1636): Started memstore
flush for testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac., current
region memstore size 7.0m
2014-04-17 09:41:02,039 DEBUG [pool-1-thread-1] regionserver.HRegion(1686): Finished snapshotting
testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac., syncing WAL and
waiting on mvcc, flushsize=0
{code}

So somehow it is not making progress once it gets into this state.


> TestHRegionBusyWait.testWritesWhileScanning fails frequently in 0.94
> --------------------------------------------------------------------
>
>                 Key: HBASE-11017
>                 URL: https://issues.apache.org/jira/browse/HBASE-11017
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: stack
>             Fix For: 0.94.19
>
>
> Have seen a few of these:
> {code}
> Error Message
> Failed clearing memory after 6 attempts on region: testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac.
> Stacktrace
> org.apache.hadoop.hbase.DroppedSnapshotException: Failed clearing memory after 6 attempts
on region: testWritesWhileScanning,,1397727647509.2c968a587c4cb7e84a52c7aa8d2afcac.
> 	at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1087)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1024)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:989)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.closeHRegion(HRegion.java:4346)
> 	at org.apache.hadoop.hbase.regionserver.TestHRegion.testWritesWhileScanning(TestHRegion.java:3406)
> {code}



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