Michi Mutsuzaki created ZOOKEEPER-1485:
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Summary: client xid overflow is not handled
Key: ZOOKEEPER-1485
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1485
Project: ZooKeeper
Issue Type: Bug
Components: c client, java client
Affects Versions: 3.3.5, 3.4.3
Reporter: Michi Mutsuzaki
Both Java and C clients use signed 32-bit int as XIDs. XIDs are assumed to be
non-negative, and zookeeper uses some negative values as special XIDs (e.g. -2
for ping, -4 for auth). However, neither Java nor C client ensures the XIDs it
generates are non-negative, and the server doesn't reject negative XIDs.
Pat had some suggestions on how to fix this:
- (bin-compat) Expire the session when the client sends a negative XID.
- (bin-incompat) In addition to expiring the session, use 64-bit int for XID so
that overflow will practically never happen.
--Michi
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