FAQ
I have managed to get my server backup and running after struggling for 2
weeks, however only 3 of the 6 nodes are up, the ones not working give the
following error in the tasktracker log of one of the failed data nodes.

2014-01-16 13:44:12,999 ERROR org.apache.hadoop.mapred.TaskTracker: Caught
exception: java.net.ConnectException: Call From
Node06.xxx.xx.xx/xx.xxx.xxx.xxx to Node02.xxx.xx.xx:8021 failed on
connection exception: java.net.ConnectException: Connection refused; For
more details see: http://wiki.apache.org/hadoop/ConnectionRefused

Caused by: java.net.ConnectException: *Connection refused.*

I have looked in the Jobtracker logs but nothing is mentioned regarding
this problem.

Node02 is listening on port 8021, as it has successfully connected to 3 of
the Nodes(02,04,05) and is listening still.
Not sure why this is happening.

Thanks
Duncan

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  • Duncan Gillies at Jan 23, 2014 at 1:47 pm
    Just a heads up for anyone else having this issue, we managed to solve it
    by hard stopping the agent, deleting the supervisord rogue process we found
    and starting up the agent again. Started up the mapreduce service and
    everything is 100% again.

    Cheers and thanks for the help.
    On Friday, January 17, 2014 12:53:40 PM UTC+2, Duncan Gillies wrote:

    I have managed to get my server backup and running after struggling for 2
    weeks, however only 3 of the 6 nodes are up, the ones not working give the
    following error in the tasktracker log of one of the failed data nodes.

    2014-01-16 13:44:12,999 ERROR org.apache.hadoop.mapred.TaskTracker: Caught
    exception: java.net.ConnectException: Call From
    Node06.xxx.xx.xx/xx.xxx.xxx.xxx to Node02.xxx.xx.xx:8021 failed on
    connection exception: java.net.ConnectException: Connection refused; For
    more details see: http://wiki.apache.org/hadoop/ConnectionRefused

    Caused by: java.net.ConnectException: *Connection refused.*

    I have looked in the Jobtracker logs but nothing is mentioned regarding
    this problem.

    Node02 is listening on port 8021, as it has successfully connected to 3 of
    the Nodes(02,04,05) and is listening still.
    Not sure why this is happening.

    Thanks
    Duncan
    To unsubscribe from this group and stop receiving emails from it, send an email to scm-users+unsubscribe@cloudera.org.

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postedJan 17, '14 at 10:53a
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