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https://issues.apache.org/jira/browse/HDFS-15801?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang resolved HDFS-15801.
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Fix Version/s: 2.10.2
Resolution: Fixed
Thanks. This is merged.
> Backport HDFS-14582 to branch-2.10 (Failed to start DN with
> ArithmeticException when NULL checksum used)
> --------------------------------------------------------------------------------------------------------
>
> Key: HDFS-15801
> URL: https://issues.apache.org/jira/browse/HDFS-15801
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Janus Chow
> Assignee: Janus Chow
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.10.2
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> In HDFS-14582, the error message is more clear as follows:
> {code:java}
> Caused by: java.lang.ArithmeticException: / by zero
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice.validateIntegrityAndSetLength(BlockPoolSlice.java:823)
> at
> {code}
> But in branch-2.10.1, the exception message is omitted as follows:
> {code:java}
> 2021-01-29 14:20:30,694 INFO impl.FsDatasetImpl (FsVolumeList.java:run(204))
> - Caught exception while adding replicas from /mnt/disk/0/hdfs/data/current.
> Will throw later.
> java.io.IOException: Failed to start sub tasks to add replica in replica map
> :java.lang.ArithmeticExceptionjava.io.IOException: Failed to start sub tasks
> to add replica in replica map :java.lang.ArithmeticException at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice.getVolumeMap(BlockPoolSlice.java:434)
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl.getVolumeMap(FsVolumeImpl.java:930)
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeList$1.run(FsVolumeList.java:196)
> {code}
> The specific error message is omitted, causing it harder to find the root
> cause.
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