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Merge pull request #13249 from NixOS/more-robust-json-logger

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Make the JSON logger more robust
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Jörg Thalheim 2025-05-23 10:25:16 +02:00 • committed by GitHub
commit 5b4806ab3c
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1 changed files with 13 additions and 2 deletions
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15
src/libutil/logging.cc
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@ -204,6 +204,7 @@ struct JSONLogger : Logger {
struct State
{
bool enabled = true;
};
Sync<State> _state;
@ -216,8 +217,18 @@ struct JSONLogger : Logger {
/* Acquire a lock to prevent log messages from clobbering each
other. */
auto state(_state.lock());
writeLine(fd, line);
try {
auto state(_state.lock());
if (state->enabled)
writeLine(fd, line);
} catch (...) {
bool enabled = false;
std::swap(_state.lock()->enabled, enabled);
if (enabled) {
ignoreExceptionExceptInterrupt();
logger->warn("disabling JSON logger due to write errors");
}
}
}
void log(Verbosity lvl, std::string_view s) override