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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1782) Self-inflicted RS temporary deadlocks
Date Fri, 21 Aug 2009 16:04:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12746038#action_12746038
] 

Jean-Daniel Cryans commented on HBASE-1782:
-------------------------------------------

Region server log:

{code}
2009-08-21 11:41:42,156 INFO org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Too many
store files for region 
TestTable,0001035093,1250869123747: 8, requesting compaction and waiting
2009-08-21 11:41:42,396 INFO org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Too many
store files for region 
TestTable,0001035093,1250869123747: 8, requesting compaction and waiting
2009-08-21 11:41:43,494 INFO org.apache.hadoop.hbase.regionserver.HRegion: 
region TestTable,,1250869299588/564244348 available; sequence id is 136
2009-08-21 11:41:43,494 INFO org.apache.hadoop.hbase.regionserver.HRegion: Closed TestTable,,1250869299588
2009-08-21 11:41:43,552 INFO org.apache.hadoop.hbase.regionserver.HRegion: 
region TestTable,0000515165,1250869299588/365139303 available; sequence id is 137
2009-08-21 11:41:43,552 INFO org.apache.hadoop.hbase.regionserver.HRegion: Closed TestTable,0000515165,1250869299588
2009-08-21 11:43:12,406 WARN org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Tried to
hold up flushing for compactions of region 
TestTable,0001035093,1250869123747 but have waited longer than 90000ms, continuing
2009-08-21 11:43:12,418 WARN org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Tried to
hold up flushing for compactions of region 
TestTable,0001035093,1250869123747 but have waited longer than 90000ms, continuing

{code}

> Self-inflicted RS temporary deadlocks
> -------------------------------------
>
>                 Key: HBASE-1782
>                 URL: https://issues.apache.org/jira/browse/HBASE-1782
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Jean-Daniel Cryans
>             Fix For: 0.20.1, 0.21.0
>
>
> When a region has too many store files and that that region server holds .META., it is
easy to get a 90s deadlock. I will paste the stack traces in a moment.

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