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Posted to issues@geode.apache.org by "Barry Oglesby (JIRA)" <ji...@apache.org> on 2019/08/09 00:10:00 UTC
[jira] [Created] (GEODE-7066) Events can be lost in a gateway batch
containing duplicate non-conflatable events with conflation enabled
Barry Oglesby created GEODE-7066:
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Summary: Events can be lost in a gateway batch containing duplicate non-conflatable events with conflation enabled
Key: GEODE-7066
URL: https://issues.apache.org/jira/browse/GEODE-7066
Project: Geode
Issue Type: Bug
Components: wan
Reporter: Barry Oglesby
If a batch contains duplicate CREATE and DESTROY events on key 1736 like below and conflation is enabled, the earlier events will be overwritten by the later events.
{noformat}
GatewaySenderEventImpl[id=EventID[id=31bytes;threadID=0x30004|6;sequenceID=6072];operation=CREATE;region=/SESSIONS;key=6079],
GatewaySenderEventImpl[id=EventID[id=31bytes;threadID=0x30004|6;sequenceID=6073];operation=UPDATE;region=/SESSIONS;key=6079],
GatewaySenderEventImpl[id=EventID[id=31bytes;threadID=0x30004|5;sequenceID=6009];operation=CREATE;region=/SESSIONS;key=1736],
GatewaySenderEventImpl[id=EventID[id=31bytes;threadID=0x30004|6;sequenceID=6074];operation=DESTROY;region=/SESSIONS;key=6079],
GatewaySenderEventImpl[id=EventID[id=31bytes;threadID=0x30004|5;sequenceID=6011];operation=DESTROY;region=/SESSIONS;key=1736],
GatewaySenderEventImpl[id=EventID[id=31bytes;threadID=0x30004|6;sequenceID=6087];operation=CREATE;region=/SESSIONS;key=1736],
GatewaySenderEventImpl[id=EventID[id=31bytes;threadID=0x30004|6;sequenceID=6089];operation=DESTROY;region=/SESSIONS;key=1736]
{noformat}
The batch will look like this after conflation:
{noformat}
GatewaySenderEventImpl[id=EventID[id=31 bytes;threadID=0x30004|6;sequenceID=6072];operation=CREATE;region=/SESSIONS;key=6079],
GatewaySenderEventImpl[id=EventID[id=31 bytes;threadID=0x30004|6;sequenceID=6073];operation=UPDATE;region=/SESSIONS;key=6079],
GatewaySenderEventImpl[id=EventID[id=31 bytes;threadID=0x30004|6;sequenceID=6087];operation=CREATE;region=/SESSIONS;key=1736],
GatewaySenderEventImpl[id=EventID[id=31 bytes;threadID=0x30004|6;sequenceID=6074];operation=DESTROY;region=/SESSIONS;key=6079],
GatewaySenderEventImpl[id=EventID[id=31 bytes;threadID=0x30004|6;sequenceID=6089];operation=DESTROY;region=/SESSIONS;key=1736]
{noformat}
All the events from threadID=0x30004|5 are gone.
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