Siyao Meng created HDDS-4678:
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Summary: Add an option to limit the number of OM events Recon
retrieves in each batch
Key: HDDS-4678
URL: https://issues.apache.org/jira/browse/HDDS-4678
Project: Hadoop Distributed Data Store
Issue Type: Improvement
Components: Ozone Recon
Affects Versions: 1.0.0
Reporter: Siyao Meng
See original comment:
https://github.com/apache/ozone/pull/1680#pullrequestreview-549375494
Summary: Currently we don't have explicit control over how much events Recon
will receive on each batch of events from OM. This can lead to Recon OOM like
in HDDS-4570 when the max heap is too small and/or OM is too busy and/or [sync
interval|https://github.com/apache/ozone/blob/efaa4fcb46d70cbce40451402bfb56dcc098802a/hadoop-ozone/recon/src/main/java/org/apache/hadoop/ozone/recon/spi/impl/OzoneManagerServiceProviderImpl.java#L219-L230]
is too long.
A good start point for looking into this might be at
[{{OzoneManagerServiceProviderImpl#syncDataFromOM}}|https://github.com/apache/ozone/blob/efaa4fcb46d70cbce40451402bfb56dcc098802a/hadoop-ozone/recon/src/main/java/org/apache/hadoop/ozone/recon/spi/impl/OzoneManagerServiceProviderImpl.java#L402].
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