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https://issues.apache.org/jira/browse/HDFS-16269?focusedWorklogId=666119&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-666119
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ASF GitHub Bot logged work on HDFS-16269:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Oct/21 03:51
Start Date: 18/Oct/21 03:51
Worklog Time Spent: 10m
Work Description: jianghuazhu commented on pull request #3544:
URL: https://github.com/apache/hadoop/pull/3544#issuecomment-945338893
Thank you @jojochuang for your comments and reviews.
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Issue Time Tracking
-------------------
Worklog Id: (was: 666119)
Time Spent: 1h (was: 50m)
> [Fix] Improve NNThroughputBenchmark#blockReport operation
> ---------------------------------------------------------
>
> Key: HDFS-16269
> URL: https://issues.apache.org/jira/browse/HDFS-16269
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: benchmarks, namenode
> Affects Versions: 2.9.2
> Reporter: JiangHua Zhu
> Assignee: JiangHua Zhu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> When using NNThroughputBenchmark to verify the blockReport, you will get some
> exception information.
> Commands used:
> ./bin/hadoop org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark -fs
> xxxx -op blockReport -datanodes 3 -reports 1
> The exception information:
> 21/10/12 14:35:18 INFO namenode.NNThroughputBenchmark: Starting benchmark:
> blockReport
> 21/10/12 14:35:19 INFO namenode.NNThroughputBenchmark: Creating 10 files with
> 10 blocks each.
> 21/10/12 14:35:19 ERROR namenode.NNThroughputBenchmark:
> java.lang.ArrayIndexOutOfBoundsException: 50009
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark$BlockReportStats.addBlocks(NNThroughputBenchmark.java:1161)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark$BlockReportStats.generateInputs(NNThroughputBenchmark.java:1143)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark$OperationStatsBase.benchmark(NNThroughputBenchmark.java:257)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark.run(NNThroughputBenchmark.java:1528)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark.runBenchmark(NNThroughputBenchmark.java:1430)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark.main(NNThroughputBenchmark.java:1550)
> Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 50009
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark$BlockReportStats.addBlocks(NNThroughputBenchmark.java:1161)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark$BlockReportStats.generateInputs(NNThroughputBenchmark.java:1143)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark$OperationStatsBase.benchmark(NNThroughputBenchmark.java:257)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark.run(NNThroughputBenchmark.java:1528)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark.runBenchmark(NNThroughputBenchmark.java:1430)
> at
> org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark.main(NNThroughputBenchmark.java:1550)
> Checked some code and found that the problem appeared here.
> private ExtendedBlock addBlocks(String fileName, String clientName)
> throws IOException {
> for(DatanodeInfo dnInfo: loc.getLocations()) {
> int dnIdx = dnInfo.getXferPort()-1;
> datanodes[dnIdx].addBlock(loc.getBlock().getLocalBlock());
> }
> }
> It can be seen from this that what dnInfo.getXferPort() gets is a port
> information and should not be used as an index of an array.
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