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https://issues.apache.org/jira/browse/HDFS-4389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13552611#comment-13552611
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Steve Loughran commented on HDFS-4389:
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I think old retry policy used to be longer than 30s, so a restart of a
small-mid cluster may not have been noticed
The short-term workaround is to change the retry policy to be something else &
to block for longer.
> Non-HA DFSClients do not attempt reconnects
> -------------------------------------------
>
> Key: HDFS-4389
> URL: https://issues.apache.org/jira/browse/HDFS-4389
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha, hdfs-client
> Affects Versions: 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Priority: Critical
>
> The HA retry policy implementation appears to have broken non-HA
> {{DFSClient}} connect retries. The ipc
> {{Client.Connection#handleConnectionFailure}} used to perform 45 connection
> attempts, but now it consults a retry policy. For non-HA proxies, the policy
> does not handle {{ConnectException}}.
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