issue with logging sometimes not writing to the file

[z11373]

Hi, we are running streamparse v3.13.1 on production, and we have our spout code simply calls self.logger.info(), which I guess it inherits from pystorm component (maybe https://github.com/pystorm/pystorm/blob/master/pystorm/component.py#L247 ?)

I just learned that in the past few days no log lines being produced by that spout, but surprisingly today I see it writes the log again to the file. Checking the python process on the machine, I see the spout has been running since Jan 28th. This is very unfortunate, given when we really need the logs (from that spout), they are not available, and I don't know why :-( One thing for sure, the spout is still processing events, it's just what it's doing not being recorded to the log. I see other spouts/bolts in the topology seem fine.

Any idea what could be the cause of this mysterious missing logs? And how can I debug this? Of course, if I simply kill the spout process, then Storm will automatically restart it, and the logging will be fine again. I really appreciate any help here. Thanks!