[HDFS-14240] blockReport test in NNThroughputBenchmark throws ArrayIndexOutOfBoundsException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Assignee: Unassigned
• Reporter: Shen Yinjie
• Created: 29/Jan/19 06:52
• Updated: 02/Nov/21 02:07
• Resolved: 02/Nov/21 02:06

Description

_emphasized text_When I run a blockReport test with NNThroughputBenchmark, BlockReportStats.addBlocks() throws ArrayIndexOutOfBoundsException.

digging the code:

for(DatanodeInfo dnInfo : loc.getLocations())

{ int dnIdx = dnInfo.getXferPort() - 1; datanodes[dnIdx].addBlock(loc.getBlock().getLocalBlock());

 

problem is here:array datanodes's length is determined by args as "-datanodes" or "-threads" ，but dnIdx = dnInfo.getXferPort() is a random port.

Issue Links

• is duplicated by: HDFS-16269 [Fix] Improve NNThroughputBenchmark#blockReport operation