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From "Rong-En Fan (JIRA)" <j...@apache.org>
Subject [jira] Reopened: (HBASE-990) NoSuchElementException in flushSomeRegions
Date Tue, 18 Nov 2008 03:13:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rong-En Fan reopened HBASE-990:
-------------------------------


I'm still seeing this with default settings regarding memcache / flush size with trunk r718159
(I use hadoop 0.19.0 rc1 instead of the one in the trunk). The stack trace is exactly the
same as the one in the description. However, I didn't see the new INFO message in my region
server logs. It seems to me that even after flush all online regions, global memory cache
is still larger than its low mark.

I'm writing ~2M rows in each run, within 10 runs, each runs has 1~3 errors like this one.

> NoSuchElementException in flushSomeRegions
> ------------------------------------------
>
>                 Key: HBASE-990
>                 URL: https://issues.apache.org/jira/browse/HBASE-990
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: stack
>             Fix For: 0.19.0
>
>
> From Billy
> {code}
> 2008-11-10 18:14:53,157 INFO org.apache.hadoop.ipc.Server: IPC Server handler 69 on 60020,
call batchUpdates([B@68e97c, [Lorg.apache.hadoop.hbase.io.BatchUpdate;@1b8e8d2) from 192.168.1.201:37077:
error: java.io.IOException: java.util.NoSuchElementException
> java.io.IOException: java.util.NoSuchElementException
>        at java.util.TreeMap.key(TreeMap.java:1206)
>        at java.util.TreeMap.firstKey(TreeMap.java:267)
>        at org.apache.hadoop.hbase.regionserver.MemcacheFlusher.flushSomeRegions(MemcacheFlusher.java:227)
>        at org.apache.hadoop.hbase.regionserver.MemcacheFlusher.reclaimMemcacheMemory(MemcacheFlusher.java:213)
>        at org.apache.hadoop.hbase.regionserver.HRegionServer.batchUpdates(HRegionServer.java:1227)
>        at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
>        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:634)
>        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:888) 
> {code}

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