JiangHua Zhu created HDFS-16476:
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Summary: Increase the number of metrics used to record
PendingRecoveryBlocks
Key: HDFS-16476
URL: https://issues.apache.org/jira/browse/HDFS-16476
Project: Hadoop HDFS
Issue Type: Improvement
Components: metrics, namenode
Affects Versions: 2.9.2, 3.4.0
Reporter: JiangHua Zhu
The complete process of block recovery is as follows:
1. NameNode collects which blocks need to be recovered.
2. The NameNode issues instructions to some DataNodes for execution.
3. DataNode tells NameNode after execution is complete.
Now there is no way to know how many blocks are being recovered. The number of
metrics used to record PendingRecoveryBlocks should be increased, which is good
for increasing the robustness of the cluster.
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