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From Connor Woodson <cwoodson....@gmail.com>
Subject Re: HDFSsink failover error
Date Mon, 14 Jan 2013 22:28:58 GMT
I assume that's only part of your config as it's missing a source; if you
get rid of the sink processor, can you write to each hdfs sink
individually? (comment one out at a time)

- Connor


On Mon, Jan 14, 2013 at 1:42 PM, Rahul Ravindran <rahulrv@yahoo.com> wrote:

> Hi,
>    I am attempting to setup an HDFS sink such that when a namenode
> failover occurs (active namenode is brought down and the standby namenode
> switches to active), the failover sink would send events to the new active
> namenode. I see an error about WRITE not supported in standby state..Does
> this not count as a failure for the failover sink?
> Thanks,
> ~Rahul.
>
> My config is as follows:
>
> agent1.sinks.hdfs-sink1.channel = ch1
> agent1.sinks.hdfs-sink1.type = hdfs
> agent1.sinks.hdfs-sink1.hdfs.path =
> hdfs://ip-10-4-71-187.ec2.internal/user/br/shim/eventstream/event/host101/
> agent1.sinks.hdfs-sink1.hdfs.filePrefix = event
> agent1.sinks.hdfs-sink1.hdfs.writeFormat = Text
> agent1.sinks.hdfs-sink1.hdfs.rollInterval = 120
> agent1.sinks.hdfs-sink1.hdfs.rollCount = 0
> agent1.sinks.hdfs-sink1.hdfs.rollSize = 0
> agent1.sinks.hdfs-sink1.hdfs.fileType = DataStream
> agent1.sinks.hdfs-sink1.hdfs.batchSize = 1000
> agent1.sinks.hdfs-sink1.hdfs.txnEventSize = 1000
>
> agent1.sinks.hdfs-sink1-back.channel = ch1
> agent1.sinks.hdfs-sink1-back.type = hdfs
> agent1.sinks.hdfs-sink1-back.hdfs.path =
> hdfs://ip-10-110-69-240.ec2.internal/user/br/shim/eventstream/event/host101/
> agent1.sinks.hdfs-sink1-back.hdfs.filePrefix = event
> agent1.sinks.hdfs-sink1-back.hdfs.writeFormat = Text
> agent1.sinks.hdfs-sink1-back.hdfs.rollInterval = 120
> agent1.sinks.hdfs-sink1-back.hdfs.rollCount = 0
> agent1.sinks.hdfs-sink1-back.hdfs.rollSize = 0
> agent1.sinks.hdfs-sink1-back.hdfs.fileType = DataStream
> agent1.sinks.hdfs-sink1-back.hdfs.batchSize = 1000
> agent1.sinks.hdfs-sink1-back.hdfs.txnEventSize = 1000
>
> agent1.sinkgroups.failoverGroup1.sinks = hdfs-sink1 hdfs-sink1-back
> agent1.sinkgroups.failoverGroup1.processor.type = failover
> #higher number in priority is higher priority
> agent1.sinkgroups.failoverGroup1.processor.priority.hdfs-sink1 = 10
> agent1.sinkgroups.failoverGroup1.processor.priority.hdfs-sink1-back = 5
> #failover if failure detected for 10 seconds
> agent1.sinkgroups.failoverGroup1.processor.maxpenalty = 10000
>
>
> agent1.sinkgroups = failoverGroup1
>
> 14 Jan 2013 21:37:28,819 INFO  [hdfs-hdfs-sink2-call-runner-6]
> (org.apache.flume.sink.hdfs.BucketWriter.doOpen:208)  - Creating
> hdfs://ip-10-4-71-187.ec2.internal/....
> 14 Jan 2013 21:37:28,834 WARN
>  [SinkRunner-PollingRunner-FailoverSinkProcessor]
> (org.apache.flume.sink.hdfs.HDFSEventSink.process:456)  - HDFS IO error
> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException):
> Operation category WRITE is not supported in state standby
>         at
> org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.checkOperation(StandbyState.java:87)
>         at
> org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.checkOperation(NameNode.java:1379)
>         at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOperation(FSNamesystem.java:762)
>         at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInt(FSNamesystem.java:1688)
>         at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:1669)
>         at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.create(NameNodeRpcServer.java:409)
>         at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.create(ClientNamenodeProtocolServerSideTranslatorPB.java:205)
>         at
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:44068)
>         at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:453)
>         at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:898)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1693)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1689)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1332)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1687)
>
>         at org.apache.hadoop.ipc.Client.call(Client.java:1160)
>         at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:202)
>         at $Proxy11.create(Unknown Source)
>         at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:616)
>         at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMetho
>

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