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From Zhoushuaifeng <zhoushuaif...@huawei.com>
Subject Disable table causing regionserver shutdown
Date Tue, 19 Apr 2011 12:10:01 GMT
I run the disable table command, after a while, two RegionServers shutdown.
I see the log, when close one region, compaction is running on this region:
I check the code, when close regions, it will first set writestate. writesEnabled  to false,
but if there is still compact running, this setting may interrupt compact and throw InterruptedIOException,
when the HRegion catched this Exception, compact will fail, is this the cause of Regionserver
down? If so, this may be a problem.
                 if (!this.region.areWritesEnabled()) {
                    fs.delete(writer.getPath(), false);
                    throw new InterruptedIOException(
                        "Aborting compaction of store " + this +
                        " in region " + this.region +
                        " because user requested stop.");

    } catch (InterruptedIOException iioe) {
          LOG.info("compaction interrupted by user: ", iioe);
        } finally {
          long now = EnvironmentEdgeManager.currentTimeMillis();
          LOG.info(((completed) ? "completed" : "aborted")
              + " compaction on region " + this
              + " after " + StringUtils.formatTimeDiff(now, startTime));

Some logs:

2011-04-18 14:00:56,468 DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction
requested for ufdr,1000286138199982#0129000,1302767272113.80928bc54c94a029b76098ce04c22572.
because Region has too many store files; priority=6, compaction queue size=0
2011-04-18 14:01:06,569 DEBUG org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler:
Processing close of ufdr,1000286138199982#0129000,1302767272113.80928bc54c94a029b76098ce04c22572.
2011-04-18 14:01:06,569 DEBUG org.apache.hadoop.hbase.regionserver.HRegion: Closing ufdr,1000286138199982#0129000,1302767272113.80928bc54c94a029b76098ce04c22572.:
disabling compactions & flushes
2011-04-18 14:01:06,569 DEBUG org.apache.hadoop.hbase.regionserver.HRegion: waiting for compaction
to complete for region ufdr,1000286138199982#0129000,1302767272113.80928bc54c94a029b76098ce04c22572.
2011-04-18 14:01:06,714 INFO org.apache.hadoop.hbase.regionserver.HRegion: compaction interrupted
by user:
java.io.InterruptedIOException: Aborting compaction of store value in region ufdr,1000286138199982#0129000,1302767272113.80928bc54c94a029b76098ce04c22572.
because user requested stop.
2011-04-18 14:01:06,714 INFO org.apache.hadoop.hbase.regionserver.HRegion: aborted compaction
on region ufdr,1000286138199982#0129000,1302767272113.80928bc54c94a029b76098ce04c22572. after
2011-04-18 14:01:06,714 INFO org.apache.hadoop.hbase.regionserver.CompactSplitThread: regionserver60020.compactor
2011-04-18 14:01:07,532 INFO org.apache.hadoop.hbase.regionserver.Leases: regionserver60020
closing leases
2011-04-18 14:01:07,532 INFO org.apache.hadoop.hbase.regionserver.Leases: regionserver60020
closed leases
2011-04-18 14:01:07,600 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: regionserver60020

Zhou Shuaifeng(Frank)

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