How should log4j.properties look like?

Question

After discussion here I still cannot configure my program/chainsaw

When I start ChainSaw I choose

let me use a simple Receiver on port 4445

And in my program i set configuration:

PropertyConfigurator.configure("log4j.properties");

And finally run program, and click Simple Receiver in Chainsaw

log4j.properties version1

log4j.rootLogger=DEBUG, server

log4j.appender.server=org.apache.log4j.net.SocketAppender
log4j.appender.server.Port=4445
log4j.appender.server.RemoteHost=localhost
log4j.appender.server.ReconnectionDelay=10000

log4j.properties version2

log4j.rootCategory=DEBUG, zeroconf, chainsaw
# Socket Appender
log4j.appender.chainsaw=org.apache.log4j.net.SocketAppender
log4j.appender.chainsaw.remoteHost=localhost
log4j.appender.chainsaw.port=4445
log4j.appender.chainsaw.locationInfo=true

none of them work. What should I do?

Edmon · Accepted Answer · 2012-08-03T13:05:11.983

1

try:

log4j.threshold=ALL
log4j.debug = true
log4j.rootLogger=DEBUG, chainsaw
# Socket Appender
log4j.appender.chainsaw=org.apache.log4j.net.SocketAppender
log4j.appender.chainsaw.RemoteHost=localhost
log4j.appender.chainsaw.Port=4445
log4j.appender.chainsaw.LocationInfo=true

This is good example of chainsaw configuration which is also required:

http://magnus-k-karlsson.blogspot.com/2010/02/viewingmonitoring-your-log4j-generated.html

edited Aug 03 '12 at 13:05

answered Aug 03 '12 at 12:49

Edmon

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Unfortunately I got `log4j:ERROR Could not find value for key log4j.appender.zeroconf log4j:ERROR Could not instantiate appender named "zeroconf".` – alicjasalamon Aug 03 '12 at 12:51
Take it out. It is not configured. – Edmon Aug 03 '12 at 12:51
What does log4j debug tells you, if anything? – Edmon Aug 03 '12 at 12:59
I have no idea how to check it. But if I have ChainSaw opened, a new tab should appear in it? I don't have anything like this. maybe the reason is that [Socket Receiver is inactive](http://stackoverflow.com/questions/11796027/why-is-socket-receiver-inactive-in-chainsaw)? – alicjasalamon Aug 03 '12 at 13:05
Did you, btw, configure chainsaw for Log4J ingest. – Edmon Aug 03 '12 at 13:05
Check that blog post I added to my answer. It is pretty recent. – Edmon Aug 03 '12 at 13:11

score 0 · Answer 2 · answered Feb 15 '19 at 10:13

As of version 2.4, Log4j now supports configuration via properties files. Note that the property syntax is NOT the same as the syntax used in Log4j 1.

appender.server.type=Socket
appender.server.name=server
appender.server.port=4445
appender.server.host=localhost
appender.server.reconnectDelayMillis=10000

...

rootLogger.appenderRef.server.ref = server

You might have a problem with reconnectionDelayMillis. In logging-log4j-dev mailing list archives I found out that:

The documentation (https://logging.apache.org/log4j/2.x/manual/appenders.html#SyslogAppender) still has the parameter listed as "reconnectionDelayMillis" but the code is now obviously looking for "reconnectDelayMillis". I'm going to change my config to use the new name, but I thought I'd point out the disconnect as it had me confused for a bit. Thanks - Sam

This might be fixed/unified already, but I haven't checked that in the newer versions of log4j. If you encounter any problem try using reconnectDelayMillis.

More detailed example can be found under Configuration with Properties.

How should log4j.properties look like?

2 Answers2