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From Som Satpathy <somsatpa...@gmail.com>
Subject Problem: org.apache.hadoop.mapred.ReduceTask: java.net.SocketTimeoutException: connect timed out
Date Wed, 17 Apr 2013 01:18:43 GMT
Hi All,

I have just set up a CDH cluster on EC2 using cloudera manager 4.5. I have
been trying to run a couple of mapreduce jobs as part of an oozie workflow
but have been blocked by the following exception: (my reducer always hangs
because of this) -

2013-04-17 00:32:02,268 WARN org.apache.hadoop.mapred.ReduceTask:
attempt_201304170021_0003_r_000000_0 copy failed:
attempt_201304170021_0003_m_000000_0 from
ip-10-174-49-51.us-west-1.compute.internal
2013-04-17 00:32:02,269 WARN org.apache.hadoop.mapred.ReduceTask:
java.net.SocketTimeoutException: connect timed out
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
        at
java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:529)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:158)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:395)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:530)
        at sun.net.www.http.HttpClient.<init>(HttpClient.java:234)
        at sun.net.www.http.HttpClient.New(HttpClient.java:307)
        at sun.net.www.http.HttpClient.New(HttpClient.java:324)
        at
sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:970)
        at
sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:911)
        at
sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:836)
        at
org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getInputStream(ReduceTask.java:1573)
        at
org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.setupSecureConnection(ReduceTask.java:1530)
        at
org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getMapOutput(ReduceTask.java:1466)
        at
org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.copyOutput(ReduceTask.java:1360)
        at
org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.run(ReduceTask.java:1292)

2013-04-17 00:32:02,269 INFO org.apache.hadoop.mapred.ReduceTask: Task
attempt_201304170021_0003_r_000000_0: Failed fetch #1 from
attempt_201304170021_0003_m_000000_0
2013-04-17 00:32:02,269 WARN org.apache.hadoop.mapred.ReduceTask:
attempt_201304170021_0003_r_000000_0 adding host
ip-10-174-49-51.us-west-1.compute.internal to penalty box, next contact in
12 seconds

Any suggestions that can help me get around this?

Really appreciate any help here.

Thanks,
Som

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