Add BlockTool to query file and its block info
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Key: HADOOP-4945
URL: https://issues.apache.org/jira/browse/HADOOP-4945
Project: Hadoop Core
Issue Type: New Feature
Affects Versions: 0.21.0
Reporter: zhangwei
The fsck can get the file's block detail,but when you want see which file or
datanode the block belongs to ,it will be helpless.
The BlockTool will be helpfull in developing,for example when you happened to
these message :
2008-12-25 12:12:10,049 WARN dfs.DataNode (DataNode.java:readBlock(901)) - Got
exception while serving blk_28622148 to /10.7
3.4.101:
java.io.IOException: Block blk_28622148 is not valid.
at org.apache.hadoop.dfs.FSDataset.getBlockFile(FSDataset.java:541)
at org.apache.hadoop.dfs.DataNode$BlockSender.<init>(DataNode.java:1090)
at
org.apache.hadoop.dfs.DataNode$DataXceiver.readBlock(DataNode.java:882)
at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:840)
at java.lang.Thread.run(Thread.java:595)
the Blocktool may help you to get the location,it can get the file name and
which datanodes hold the block.
Also it can get the file or directory 's block details too.
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