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It is imperative that the user manually synchronize on the returned map when iterating over any of its collection views... Failure to follow this advice may result in non-deterministic behavior.
When Synchronize on the Collection object when using synchronization wrappers, the synchronization object should be the Collection object. The . This synchronization is necessary to enforce atomicity (CON07-J. Do not assume that a grouping of calls to independently atomic methods is atomic).
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Synchronizing on a collection view instead of the collection object provides a false sense of thread safety and may cause non-deterministic behavior.
Rule | Severity | Likelihood | Remediation Cost | Priority | Level |
|---|---|---|---|---|---|
CON40-J | medium | probable | medium | P8 | L2 |
Automated Detection
The following table summarizes the examples flagged as violations by FindBugs:
Noncompliant Code Example | Flagged | Checker | Message |
|---|---|---|---|
Collection view | No | n/a |
The following table summarizes the examples flagged as violations by SureLogic Flashlight:
Noncompliant Code Example | Flagged | Message |
|---|---|---|
Collection view | No | No obvious issues |
Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
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