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GelfWriter: protect m_Stream via m_WorkQueue, not ObjectLock(this)

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On shutdown or HA re-connect ConfigObject#SetAuthority(false) is called which
does ObjectLock(this) and ConfigObject#Pause(). GelfWriter#Pause(), with the
above ObjectLock, calls m_WorkQueue.Join(). But items inside that also doing
ObjectLock(this) cause a deadlock.
This commit is contained in:
Alexander A. Klimov 2023-08-24 17:48:09 +02:00
parent 85c5a7c901
commit fecb209fe0
1 changed files with 9 additions and 12 deletions
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11
lib/perfdata/gelfwriter.cpp
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@ -114,18 +114,17 @@ void GelfWriter::Pause()
m_ReconnectTimer->Stop(true);
m_WorkQueue.Enqueue([this]() {
try {
ReconnectInternal();
} catch (const std::exception&) {
Log(LogInformation, "GelfWriter")
<< "'" << GetName() << "' paused. Unable to connect, not flushing buffers. Data may be lost on reload.";
ObjectImpl<GelfWriter>::Pause();
return;
<< "Unable to connect, not flushing buffers. Data may be lost.";
}
}, PriorityImmediate);
m_WorkQueue.Enqueue([this]() { DisconnectInternal(); }, PriorityLow);
m_WorkQueue.Join();
DisconnectInternal();
Log(LogInformation, "GelfWriter")
<< "'" << GetName() << "' paused.";
@ -513,8 +512,6 @@ void GelfWriter::SendLogMessage(const Checkable::Ptr& checkable, const String& g
String log = msgbuf.str();
ObjectLock olock(this);
if (!GetConnected())
return;