kuper created HDFS-17223:
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Summary: Add journalnode maintenance node list
Key: HDFS-17223
URL: https://issues.apache.org/jira/browse/HDFS-17223
Project: Hadoop HDFS
Issue Type: Improvement
Components: qjm
Affects Versions: 3.3.6
Reporter: kuper
* In the case of configuring 3 journal nodes in HDFS, if only 2 journal nodes
are available and 1 journal node fails to start due to machine issues, it will
result in a long initialization time for the namenode (around 30-40 minutes,
depending on the IPC timeout and retry policy configuration).
* The failed journal node cannot recover immediately, but HDFS can still
function in this situation. In our production environment, we encountered this
issue and had to reduce the IPC timeout and adjust the retry policy to
accelerate the namenode initialization and provide services.
* I'm wondering if it would be possible to have a journal node maintenance list
to speed up the namenode initialization knowing that one journal node cannot
provide services in advance?
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