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https://issues.apache.org/jira/browse/HDDS-676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16655990#comment-16655990
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Jitendra Nath Pandey commented on HDDS-676:
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# What is the reason for changing clientCache key from PipelineId to string?
# XceiverClientGrpc#isConnected : The three channels may each be in different
state.
# dnIndex is used in only one method, no need to be a class attribute.
# In XceiverClientGrpc, we should create the channel and stub, just before
making the cal in {{sendCommand}}, otherwise in majority of the cases, we would
be opening unnecessary connection.
# The changes in XceiverClientRatis are only for testing?
# It is minor but I feel we should not make {{type}} mutable in the Pipeline
class. We could clone the {{Pipeline}} object to change the type.
# In {{ContainerStateMachine}} changes don't look related to this Jira as they
are about put-small-files. If yes, we should put them in a separate jira.
# Instead of INVALID_BCSID , we should call it UNKNOWN_BCSID. Client has
obtained it from OM, so it is likely a valid one, but container doesn't have
it. We should also put the containerBcs in the error message.
> Enable Read from open Containers via Standalone Protocol
> --------------------------------------------------------
>
> Key: HDDS-676
> URL: https://issues.apache.org/jira/browse/HDDS-676
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Reporter: Shashikant Banerjee
> Assignee: Shashikant Banerjee
> Priority: Major
> Attachments: HDDS-676.001.patch
>
>
> With BlockCommitSequenceId getting updated per block commit on open
> containers in OM as well datanode, Ozone Client reads can through Standalone
> protocol not necessarily requiring Ratis. Client should verify the BCSID of
> the container which has the data block , which should always be greater than
> or equal to the BCSID of the block to be read and the existing block BCSID
> should exactly match that of the block to be read. As a part of this, Client
> can try to read from a replica with a supplied BCSID and failover to the next
> one in case the block does ont exist on one replica.
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