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Type:
Bug
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Resolution: Unresolved
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: None
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None
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Service Arch
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ALL
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SP Prioritized List
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(copied to CRM)
In https://github.com/mongodb/mongo/blob/8e4b5670df9b9fe814e57cb5f3f8ee9407237b5a/src/mongo/util/signal_handlers_synchronous.cpp , the server defines signal-handlers for a variety of signals that can be synchronously generated, like SIGSEGV and SIGABRT. The signal-handling action for these signals is defined to be some version of logging a fatal error, collecting and logging a backtrace, and the exiting. Today, this includes some known signal-unsafe behavior, such as use of mutex as described in this comment. This can result in potential deadlocks when handling a signal.
It can block other signals from being effectively processed, because the mutex is held by another signal-handler invocation. This means that if an i.e. invariant fires in the server while another signal-handler has gotten stuck, the abort raised by the invariant will never be processed.
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- Open
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- Closed
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SERVER-66562 Audit, document all functions accessed by sync signal handlers
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- Backlog
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- related to
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- In Progress
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