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https://issues.apache.org/jira/browse/HDFS-10207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15250520#comment-15250520
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Xiaobing Zhou commented on HDFS-10207:
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Thanks [~xyao] for reviews. v005 addressed all your comments except
bq. 2. Do we want to keep the unmodifieableList to avoid creating new list upon
each NamenodeRpcServer#listReconfigurableProperties() call?
TreeSet style mutable RECONFIGURABLE_PROPERTIES is needed since
1. IPC_CLIENT_RPC_BACKOFF_ENABLE is initialized during NN instantiation, and
then added to the collection.
2. to avoid duplicated entries as a result multiple NN instantiations.
3. some tests depend on order of reconfigurable properties in the collection.
> Support enable Hadoop IPC backoff without namenode restart
> ----------------------------------------------------------
>
> Key: HDFS-10207
> URL: https://issues.apache.org/jira/browse/HDFS-10207
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Xiaoyu Yao
> Assignee: Xiaobing Zhou
> Attachments: HDFS-10207-HDFS-9000.000.patch,
> HDFS-10207-HDFS-9000.001.patch, HDFS-10207-HDFS-9000.002.patch,
> HDFS-10207-HDFS-9000.003.patch, HDFS-10207-HDFS-9000.004.patch,
> HDFS-10207-HDFS-9000.005.patch
>
>
> It will be useful to allow changing {{ipc.#port#.backoff.enable}} without a
> namenode restart to protect namenode from being overloaded.
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