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https://issues.apache.org/jira/browse/HDFS-14240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shen Yinjie updated HDFS-14240:
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Attachment: screenshot-1.png
> blockReport test in NNThroughputBenchmark throws
> ArrayIndexOutOfBoundsException
> -------------------------------------------------------------------------------
>
> Key: HDFS-14240
> URL: https://issues.apache.org/jira/browse/HDFS-14240
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Shen Yinjie
> Priority: Major
> Attachments: screenshot-1.png
>
>
> When I run a blockReport test with NNThroughputBenchmark,
> BlockReportStats.addBlocks() throws ArrayIndexOutOfBoundsException.
> digging the code:
> {code:java}
> for(DatanodeInfo dnInfo : loc.getLocations())
> { int dnIdx = dnInfo.getXferPort() - 1;
> datanodes[dnIdx].addBlock(loc.getBlock().getLocalBlock());{code}
>
> problem is here:array datanodes's length is determined by args as
> "-datanodes" or "-threads" ，but dnIdx = dnInfo.getXferPort() is a random port.
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