Viraj Jasani created HBASE-24757:
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             Summary: ReplicationSink should limit the batch size for batch 
mutations based on hbase.rpc.rows.warning.threshold
                 Key: HBASE-24757
                 URL: https://issues.apache.org/jira/browse/HBASE-24757
             Project: HBase
          Issue Type: Improvement
            Reporter: Viraj Jasani


At times there are quite a large no of WAL Edits to ship as part of Replication 
and sometimes replication queues accumulate huge list of Edits to process. 
ReplicationSink at the sink server usually goes through all Edits and creates 
map of table -> list of rows grouped by clusterIds, and performs batch mutation 
of all rows per table level. However, there is no limit to no of Rows that are 
sent as part of batch mutate call. If no of rows > limit threshold defined by 
hbase.rpc.rows.warning.threshold, we usually get warn "Large batch operation 
detected". If hbase.rpc.rows.size.threshold.reject is turned on, RS will reject 
the whole batch without processing.

We should let Replication Sink honour this threshold value and accordingly keep 
the size lower per batch mutation call.

Replication triggered batch mutations should always be consumed but keeping 
limit of mutation low enough will let the system function at the same pace and 
without triggering warnings. This will also restrict exploitation of heap and 
cpu cycles at the destination.



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