Blocks staying underreplicated (for unclosed file)
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Key: HADOOP-2976
URL: https://issues.apache.org/jira/browse/HADOOP-2976
Project: Hadoop Core
Issue Type: Bug
Components: dfs
Affects Versions: 0.15.3
Reporter: Koji Noguchi
Priority: Minor
Fix For: 0.17.0
We had two files staying underreplicated for over a day.
I checked that these under-replicated blocks are not corrupted.
(They were both task tmp files and most likely didn't get closed.)
Taking one file, /aaa/_task_200803040823_0001_r_000421_0/part-00421
Namenode log showed
namenode.log.2008-03-04 2008-03-04 16:19:21,478 INFO
org.apache.hadoop.dfs.StateChange: BLOCK* NameSystem.allocateBlock:
/aaa/_task_200803040823_0001_r_000421_0/part-00421. blk_-7848645760735416126
2008-03-04 16:19:24,357 INFO org.apache.hadoop.dfs.StateChange: BLOCK*
NameSystem.addStoredBlock: blockMap updated: 11.1.111.111:22222 is added to
blk_-7848645760735416126
On the datanode 11.1.111.111, it showed
2008-03-04 16:19:24,358 INFO org.apache.hadoop.dfs.DataNode: Received block
blk_-7848645760735416126 from /55.55.55.55 and operation failed at /22.2.222.22
On the second datanode 22.2.222.22, it showed
2008-03-04 16:19:21,578 INFO org.apache.hadoop.dfs.DataNode: Exception writing
to mirror 33.3.33.33
java.net.SocketException: Connection reset
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109)
at java.io.DataOutputStream.write(DataOutputStream.java:90)
at
org.apache.hadoop.dfs.DataNode$BlockReceiver.receiveChunk(DataNode.java:1333)
at
org.apache.hadoop.dfs.DataNode$BlockReceiver.receiveBlock(DataNode.java:1386)
at org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:938)
at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:804)
at java.lang.Thread.run(Thread.java:619)
2008-03-04 16:19:24,358 ERROR org.apache.hadoop.dfs.DataNode: DataXceiver:
java.net.SocketException: Broken pipe
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
at java.io.DataOutputStream.flush(DataOutputStream.java:106)
at
org.apache.hadoop.dfs.DataNode$BlockReceiver.receiveBlock(DataNode.java:1394)
at org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:938)
at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:804)
at java.lang.Thread.run(Thread.java:619)
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