Flushing logs slows down the application intensively (Error severity logs are flushed by default) we need a way to disable flushing

[montss]

Environment details

1. Java version: 11
2. version(s): com.google.cloud:libraries-bom:26.1.3 --> com.google.cloud:google-cloud-logging-bom:3.11.5 --> com.google.cloud:google-cloud-logging:3.11.5

Steps to reproduce

Using JUL

Code example

		LoggingHandler googleHandler = new LoggingHandler();
		googleHandler.setFlushLevel(LoggingLevel.EMERGENCY);
		Logger logger = Logger.getLogger(TestClass.class.getName());
		logger.addHandler(googleHandler);

Any additional information below

Related to:-
googleapis/google-cloud-java#2796
googleapis/google-cloud-java#4254

Setting the flush level to something higher than error doesn't work.
Also setting it though logging.properties file doesn't work
com.google.cloud.logging.LoggingHandler.flushLevel=EMERGENCY

Error logs are flushed by default which causes massive slows down for that request overall
Profiling the system shows that most of the time are gone as a wall time on the flush call

We need a way to disable flushing for good.
Didn't try .setFlushLevel(Level.OFF);

[losalex]

Thanks @montss for opening this issue. Just to clarify - calling setFlushLevel(Level.EMERGENCY) in code was not working for you, correct?

[montss]

Thanks @montss for opening this issue. Just to clarify - calling setFlushLevel(Level.EMERGENCY) in code was not working for you, correct?

Correct, calling setFlushLevel(Level.EMERGENCY) didn't work nor setting it through the logging.properties file
com.google.cloud.logging.LoggingHandler.flushLevel=EMERGENCY

[daniel-sanche]

I don't have much context on this, but possibly related issue: googleapis/java-logging-logback#319

[losalex]

I don't have much context on this, but possibly related issue: googleapis/java-logging-logback#319

Thanks @daniel-sanche for context! The one issue you shared indeed related to java-logback and is not relevant for java-logging.

[losalex]

@montss , I checked in a fix - would you please be able to test it and let me know it works for you?

[losalex]

Resolving this issue for now - feel free to reopen if it doesnt work or you have any other issues

[montss]

Thank you very much!
We can now turn off flushing.