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https://issues.apache.org/jira/browse/HDDS-15521?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDDS-15521:
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Labels: pull-request-available (was: )
> StreamBlockInputStream fails with TimeoutIOException without retry or
> datanode failover
> ---------------------------------------------------------------------------------------
>
> Key: HDDS-15521
> URL: https://issues.apache.org/jira/browse/HDDS-15521
> Project: Apache Ozone
> Issue Type: Bug
> Components: Ozone Datanode
> Reporter: Yashaswini G A
> Assignee: Sadanand Shenoy
> Priority: Major
> Labels: pull-request-available
>
> With {{{}ozone.client.stream.readblock.enable=true{}}}, Ozone client reads
> fail when the datanode selected for streaming read is unavailable or slow.
> The client times out after 10s and does not retry or fail over to another
> replica.
> *Config set*
> {{<name>ozone.client.stream.readblock.enable</name> }}
> {{<value>true</value>}}
> Steps to Reproduce
> # Enable {{ozone.client.stream.readblock.enable=true}}
> # Write a key with replication factor 3 (all datanodes up)
> # Stop 1–2 datanodes hosting the block replicas
> # Run {{ozone sh key get o3://<vol>/<bucket>/<key> /tmp/<file}}
> *Command fails with:*
>
> {{WARN storage.StreamBlockInputStream: stream0-reader0: Failed to
> setCompleted: already completed
> exceptionallyjava.util.concurrent.ExecutionException:
> org.apache.ratis.protocol.exceptions.TimeoutIOException: Timed out waiting
> for response after PT10S}}
> *Expected Result*
> Read should succeed by reading from a healthy replica, same as the legacy
> {{{}BlockInputStream{}}}/{{{}readChunk{}}} path.
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