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https://issues.apache.org/jira/browse/HDFS-4562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13595604#comment-13595604
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Suresh Srinivas commented on HDFS-4562:
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Can you also include in the log snippet, lines printed for the file
/user/mapred/system/job_201303040902_85451/jobToken?
If I were to guess, one of the datanode in the pipeline reports a replica for a
block late. The replication monitor is too aggressive and creates an additional
replica meanwhile. However this should not happen for every block that is
created. Can you please give the replication related configurations from
hdfs-site.xml?
> Many excess replicas getting created
> ------------------------------------
>
> Key: HDFS-4562
> URL: https://issues.apache.org/jira/browse/HDFS-4562
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 1.1.1
> Reporter: Amareshwari Sriramadasu
> Fix For: 1.2.0
>
>
> We are seeing too many excess replicas getting created in our cluster. The
> number excess replicas in day coming out to be more than 1 lakh.
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