Application log lines > 8KB are split across multiple log lines by Passenger

[jtomson]

Question 1: What is the problem?

• What is the expected behavior?
  A single logline from rails will not be split across multiple loglines

• What is the actual behavior?
  A single logline from rails > 8KB will be split across multiple loglines

• How can we reproduce it? Please try to provide a sample application (or Virtual Machine) demonstrating the issue. Otherwise, if we can't reproduce it, we might have to ask you a number of followup questions or run certain commands to try and figure out the problem.

Log a single statement > 8KB in a rails process hosted by passenger. Passenger will have split this into > 1 logline as per

passenger/src/agent/Core/SpawningKit/PipeWatcher.h

Line 93 in 44ab81c

char buf[1024 * 8];

[jtomson]

Would it be OK to make the max log line size configurable, similar to rsyslog's MaxMessageSize and syslog-ng's log-msg-size? I would be happy to create a PR

[CamJN]

I'm not against it in theory, so I'd be open to a PR. Make sure to sign the contributor agreement if you haven't before. https://www.phusion.nl/contributor

[tsu-shiuan]

@jtomson 👋 I'm running into this issue as well. I'm going to go ahead and create a PR unless objections :)

[jtomson]

@tsu-shiuan yes by all means go ahead :) this fell off my radar

[tsu-shiuan]

@CamJN @jtomson I've submitted a pull request here :)

#2442

[jtomson]

@CamJN please take a look at the newer PR #2458 since this seems to have stalled? thanks!