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https://issues.apache.org/jira/browse/HDFS-17546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17852960#comment-17852960
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ASF GitHub Bot commented on HDFS-17546:
---------------------------------------
NyteKnight opened a new pull request, #6873:
URL: https://github.com/apache/hadoop/pull/6873
### Description of PR
In hadoop environments that rely on NAS to house dfs.hosts file, during FS
hangs (for any reason) the refreshNodes call would infinitely hang (causing a
blocked thread) until the FS returns.
### How was this patch tested?
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
> Implementing Timeout for HostFileReader when FS hangs
> -----------------------------------------------------
>
> Key: HDFS-17546
> URL: https://issues.apache.org/jira/browse/HDFS-17546
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Simbarashe Dzinamarira
> Assignee: Simbarashe Dzinamarira
> Priority: Minor
>
> Certain implementations of Hadoop have the dfs.hosts file residing on NAS/NFS
> and potentially with symlinks. If the FS hangs for any reason, the
> refreshNodes call would infinitely hang on the HostsFileReader until the FS
> returns.
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