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https://issues.apache.org/jira/browse/HDFS-2554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13438073#comment-13438073
]
Eli Collins commented on HDFS-2554:
-----------------------------------
Looks like we need another rev:
{noformat}
2012-08-18 22:38:58,132 FATAL blockmanagement.BlockManager
(BlockManager.java:run(3047)) - ReplicationMonitor thread received Runtime
exception.
java.lang.NullPointerException
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.updateCorruptMissingCounts(BlockManager.java:1090)
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.updateState(BlockManager.java:1107)
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeDatanodeWork(BlockManager.java:3083)
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockManager$ReplicationMonitor.run(BlockManager.java:3040)
at java.lang.Thread.run(Thread.java:662)
{noformat}
> Add separate metrics for missing blocks with desired replication level 1
> ------------------------------------------------------------------------
>
> Key: HDFS-2554
> URL: https://issues.apache.org/jira/browse/HDFS-2554
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 2.0.0-alpha
> Reporter: Todd Lipcon
> Assignee: Andy Isaacson
> Priority: Minor
> Attachments: hdfs-2554.txt
>
>
> Some users use replication level set to 1 for datasets which are unimportant
> and can be lost with no worry (eg the output of terasort tests). But other
> data on the cluster is important and should not be lost. It would be useful
> to separate the metric for missing blocks by the desired replication level of
> those blocks, so that one could ignore missing blocks at repl 1 while still
> alerting on missing blocks with higher desired replication.
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