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| Summary: |
Possible endless loop in WeakListenersImpl.ProxyListener<init>() |
| Product: |
platform
|
Reporter: |
mklaehn <mklaehn> |
| Component: |
-- Other -- | Assignee: |
Jaroslav Tulach <jtulach> |
| Status: |
RESOLVED
FIXED
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| Severity: |
normal
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|
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| Priority: |
P2
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| Version: |
7.4 | |
|
| Hardware: |
All | |
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| OS: |
All | |
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Issue Type:
|
DEFECT
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Exception Reporter:
|
|
|---|
| Attachments: |
proposed patch
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Created attachment 141552 [details] proposed patch In the constructor of WeakListenersImpl.ProxyListener there is an unsynchronized access to a static WeakHashMap. WeakHashMap itself is not threadsafe and must be wrapped in a synchronized container to prevent data structure corruption. The corruption has the effect of a tight loop and thus blocks the Thread. Not a deadlock but bad nonetheless. Multi-threaded calls to public static <T extends EventListener> T create(Class<T> lType, Class<? super T> apiType, T l, Object source) can lead to said corruption and block the caller Thread. The attached patch wraps the WeakHashMap in a synchronized Map and thus fixes this defect.