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From "Derek Wollenstein (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5584) DFSClient continues to retry indefinitely
Date Thu, 26 Mar 2009 16:50:03 GMT
DFSClient continues to retry indefinitely
-----------------------------------------

                 Key: HADOOP-5584
                 URL: https://issues.apache.org/jira/browse/HADOOP-5584
             Project: Hadoop Core
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.19.1
            Reporter: Derek Wollenstein
            Priority: Minor


I encountered a bug when trying to upload data using the Hadoop DFS Client.  
After receiving a NotReplicatedYetException, the DFSClient will normally retry its upload
up to some limited number of times.  In this case, I found that this retry loop continued
indefinitely, to the point that the number of tries remaining was negative:
2009-03-25 16:20:02 [INFO] 
2009-03-25 16:20:02 [INFO] 09/03/25 16:20:02 INFO hdfs.DFSClient: Waiting for replication
for 21 seconds
2009-03-25 16:20:03 [INFO] 09/03/25 16:20:02 WARN hdfs.DFSClient: NotReplicatedYetException
sleeping /apollo/env/SummaryMySQL/var/logstore/fiorello_logs_2009
0325_us/logs_20090325_us_13 retries left -1


The stack trace for the failure that's retrying is:
2009-03-25 16:20:02 [INFO] 09/03/25 16:20:02 INFO hdfs.DFSClient: org.apache.hadoop.ipc.RemoteException:
org.apache.hadoop.hdfs.server.namenode.NotReplicated
YetException: Not replicated yet:<filename>
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1266)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:351)
2009-03-25 16:20:02 [INFO]      at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
2009-03-25 16:20:02 [INFO]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
2009-03-25 16:20:02 [INFO]      at java.lang.reflect.Method.invoke(Method.java:597)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.ipc.Server$Handler.run(Server.java:894)
2009-03-25 16:20:02 [INFO] 
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.ipc.Client.call(Client.java:697)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)
2009-03-25 16:20:02 [INFO]      at $Proxy0.addBlock(Unknown Source)
2009-03-25 16:20:02 [INFO]      at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
2009-03-25 16:20:02 [INFO]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
2009-03-25 16:20:02 [INFO]      at java.lang.reflect.Method.invoke(Method.java:597)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
2009-03-25 16:20:02 [INFO]      at $Proxy0.addBlock(Unknown Source)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2814)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2696)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:1996)
2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2183)


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