Failed split results in closed region and non-registration of daughters; fix
the order in which things are run
--------------------------------------------------------------------------------------------------------------
Key: HBASE-1972
URL: https://issues.apache.org/jira/browse/HBASE-1972
Project: Hadoop HBase
Issue Type: Bug
Reporter: stack
Priority: Blocker
Fix For: 0.21.0
As part of a split, we go to close the region. The close fails because flush
failed -- a DN was down and HDFS refuses to move past it -- so we jump up out
of the close with an IOE. But the region has been closed yet its still in the
.META. as online.
Here is where the hole is:
1. CompactSplitThread calls split.
2. This calls HRegion splitRegion.
3. splitRegion calls close(false).
4. Down the end of the close, we get as far as the LOG.info("Closed " +
this)..... but a DFSClient running thread throws an exception because it can't
allocate block for the flush made as part of the close (Ain't sure how... we
should add more try/catch in here):
{code}
2009-11-12 00:47:17,865 [regionserver/208.76.44.142:60020.compactor] DEBUG
org.apache.hadoop.hbase.regionserver.Store: Added
hdfs://aa0-000-12.u.powerset.com:9002/hbase/TestTable/868626151/info/5071349140567656566,
entries=46975, sequenceid=2350017, memsize=52.0m, filesize=46.5m to
TestTable,,1257986664542
2009-11-12 00:47:17,866 [regionserver/208.76.44.142:60020.compactor] DEBUG
org.apache.hadoop.hbase.regionserver.HRegion: Finished memstore flush of ~52.0m
for region TestTable,,1257986664542 in 7985ms, sequence id=2350017, compaction
requested=false
2009-11-12 00:47:17,866 [regionserver/208.76.44.142:60020.compactor] DEBUG
org.apache.hadoop.hbase.regionserver.Store: closed info
2009-11-12 00:47:17,866 [regionserver/208.76.44.142:60020.compactor] INFO
org.apache.hadoop.hbase.regionserver.HRegion: Closed TestTable,,1257986664542
2009-11-12 00:47:17,906 [Thread-315] INFO org.apache.hadoop.hdfs.DFSClient:
Exception in createBlockOutputStream java.io.IOException: Bad connect ack with
firstBadLink as 208.76.44.140:51010
2009-11-12 00:47:17,906 [Thread-315] INFO org.apache.hadoop.hdfs.DFSClient:
Abandoning block blk_1351692500502810095_1391
2009-11-12 00:47:23,918 [Thread-315] INFO org.apache.hadoop.hdfs.DFSClient:
Exception in createBlockOutputStream java.io.IOException: Bad connect ack with
firstBadLink as 208.76.44.140:51010
2009-11-12 00:47:23,918 [Thread-315] INFO org.apache.hadoop.hdfs.DFSClient:
Abandoning block blk_-3310646336307339512_1391
2009-11-12 00:47:29,982 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient:
Exception in createBlockOutputStream java.io.IOException: Bad connect ack with
firstBadLink as 208.76.44.140:51010
2009-11-12 00:47:29,982 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient:
Abandoning block blk_3070440586900692765_1393
2009-11-12 00:47:35,997 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient:
Exception in createBlockOutputStream java.io.IOException: Bad connect ack with
firstBadLink as 208.76.44.140:51010
2009-11-12 00:47:35,997 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient:
Abandoning block blk_-5656011219762164043_1393
2009-11-12 00:47:42,007 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient:
Exception in createBlockOutputStream java.io.IOException: Bad connect ack with
firstBadLink as 208.76.44.140:51010
2009-11-12 00:47:42,007 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient:
Abandoning block blk_-2359634393837722978_1393
2009-11-12 00:47:48,017 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient:
Exception in createBlockOutputStream java.io.IOException: Bad connect ack with
firstBadLink as 208.76.44.140:51010
2009-11-12 00:47:48,017 [Thread-318] INFO org.apache.hadoop.hdfs.DFSClient:
Abandoning block blk_-1626727145091780831_1393
2009-11-12 00:47:54,022 [Thread-318] WARN org.apache.hadoop.hdfs.DFSClient:
DataStreamer Exception: java.io.IOException: Unable to create new block.
at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSClient.java:3100)
at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2681)
2009-11-12 00:47:54,022 [Thread-318] WARN org.apache.hadoop.hdfs.DFSClient:
Could not get block locations. Source file
"/hbase/TestTable/868626151/splits/1211221550/info/5071349140567656566.868626151"
- Aborting...
2009-11-12 00:47:54,029 [regionserver/208.76.44.142:60020.compactor] ERROR
org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction/Split
failed for region TestTable,,1257986664542
java.io.IOException: Bad connect ack with firstBadLink as 208.76.44.140:51010
at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.createBlockOutputStream(DFSClient.java:3160)
at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSClient.java:3080)
at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2681)
{code}
Marking this as blocker.
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