HDDS-7787. GetChecksum for EC files can fail intermittently with IndexOutOfBounds exception #4180
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What changes were proposed in this pull request?
When calculating a checksum for an EC file with Rack Topology enabled, you can get the following error intermittently:
This is because the wrong nodes are used to obtain the stripe checksum sometimes as the node does not correctly use the replicaIndex in the pipeline to order the nodes.
What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-7787
How was this patch tested?
An existing test covers the checksum validate, so it confirms this change has not broken anything. The actual problem is difficult to reproduce in a unit test as the rack awareness is not easy to setup in such a way to affect the node order in the pipeline. We do have a reproducible test with a Hive workload that causes this, so we can validate the fix that way after this has been committed.