Alexey Serbin created KUDU-2743:
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Summary: A process spawned by {{Subprocess::Start()}} can deadlock
Key: KUDU-2743
URL: https://issues.apache.org/jira/browse/KUDU-2743
Project: Kudu
Issue Type: Bug
Affects Versions: 1.8.0, 1.9.0, 1.10.0
Reporter: Alexey Serbin
Assignee: Alexey Serbin
A process spawned by {{Subprocess::Start()}} deadlocks under the following
conditions:
* The executable to run doesn't not exists and {{execve()}} returns an error.
* The child process copied over glog's mutex in locked state from the parent.
As a general note, it's not safe to call non-async-signal-safe functions in the
child process between {{fork()}} and {{exec()}}. Surprisingly, a call to LOG()
locks a mutex that may have been copied from the parent's address space in an
already locked state, so it is not async-signal-safe and can deadlock the child
if called.
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