[
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}
--
This message was sent by Atlassian JIRA
(v6.2#6252)
