Robert Stupp created CASSANDRA-14871:
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Summary: Severe concurrency issues in
STCS,DTCS,TWCS,TMD.Topology,TypeParser
Key: CASSANDRA-14871
URL: https://issues.apache.org/jira/browse/CASSANDRA-14871
Project: Cassandra
Issue Type: Bug
Components: Core
Reporter: Robert Stupp
Assignee: Robert Stupp
Fix For: 4.0, 3.0.x, 3.11.x
There are a couple of places in the code base that do not respect that
j.u.HashMap + related classes are not thread safe and some parts rely on
internals of the implementation of HM, which can change.
We have observed failures like {{NullPointerException}} and
{{ConcurrentModificationException}} as well as wrong behavior.
Affected areas in the code base:
* {{SizeTieredCompactionStrategy}}
* {{DateTieredCompactionStrategy}}
* {{TimeWindowCompactionStrategy}}
* {{TokenMetadata.Topology}}
* {{TypeParser}}
* streaming / concurrent access to {{LifecycleTransaction}} (handled in
CASSANDRA-14554)
While the patches for the compaction strategies + {{TypeParser}} are pretty
straight forward, the patch for {{TokenMetadata.Topology}} requires it to be
made immutable.
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