[HDFS-14604] OEV tool fails to read edit xml file if OP_TRUNCATE has BLOCK tag

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.2, 3.1.1, 2.9.2, 3.1.2
• Component/s: tools
• Labels: patch
• Target Version/s: 3.1.2
• Hadoop Flags: Reviewed
• Release Note: Fixed HDFS OEV deserialized edits log conversion from XML to binary error when OP_TRUNCATE existed.
• Tags: HDFS OEV
• Flags: Patch
• Docs Text: Fixed HDFS OEV deserialized edits log conversion from XML to binary error when OP_TRUNCATE existed.
• Assignee: Unassigned
• Reporter: huowang
• Created: 25/Jun/19 07:10
• Updated: 21/Jan/21 05:40
• Resolved: 25/Jun/19 07:19

Description

    使用 HDFS OEV 命令处理 edits 文件,从xml格式的文件转成成binary格式的文件的时候,当xml文件中存在 OP_TRUNCATE 操作并且含有子 BLOCK的时候报错 

    我追踪了源码发现 blockFromXml 方法需要的是一个block 对象但是被传递的是一个 data对象,我已经解决了这个问题,并且验证了可用性,

     When edits files are processed with HDFS OEV command and converted from XML files to binary files, errors are reported when OP_TRUNCATE operation exists in XML files and BLOCKs are included.

    I tracked the source code and found that the blockFromXml method needed a block object but was passed a data object. I have solved this problem and verified its availability.

    I will submit a patch for this as soon as possible.