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https://issues.apache.org/jira/browse/HDFS-14235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16772979#comment-16772979
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Hudson commented on HDFS-14235:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #16005 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/16005/])
HDFS-14235. Handle ArrayIndexOutOfBoundsException in (surendralilhore: rev
41e18feda3f5ff924c87c4bed5b5cbbaecb19ae1)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/metrics/DataNodeDiskMetrics.java
> Handle ArrayIndexOutOfBoundsException in
> DataNodeDiskMetrics#slowDiskDetectionDaemon
> -------------------------------------------------------------------------------------
>
> Key: HDFS-14235
> URL: https://issues.apache.org/jira/browse/HDFS-14235
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Surendra Singh Lilhore
> Assignee: Ranith Sardar
> Priority: Major
> Fix For: 3.3.0, 3.2.1
>
> Attachments: HDFS-14235.000.patch, HDFS-14235.001.patch,
> HDFS-14235.002.patch, HDFS-14235.003.patch, NPE.png, exception.png
>
>
> below code throwing exception because {{volumeIterator.next()}} called two
> time without checking hashNext().
> {code:java}
> while (volumeIterator.hasNext()) {
> FsVolumeSpi volume = volumeIterator.next();
> DataNodeVolumeMetrics metrics = volumeIterator.next().getMetrics();
> String volumeName = volume.getBaseURI().getPath();
> metadataOpStats.put(volumeName,
> metrics.getMetadataOperationMean());
> readIoStats.put(volumeName, metrics.getReadIoMean());
> writeIoStats.put(volumeName, metrics.getWriteIoMean());
> }{code}
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