[Bug 57002] New: SocketAppender freezes for about 15 seconds if the server is not available

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=57002

            Bug ID: 57002
           Summary: SocketAppender freezes for about 15 seconds if the
                    server is not available
           Product: Log4j
           Version: 1.2.17
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Appender
          Assignee: log4j-dev@logging.apache.org
          Reporter: keitai.1948@gmail.com

I am using the SocketAppender to log the execution of scripts (short-lived Java
applications that fire some actions and die a few seconds later). I log the
activity of those scripts in files but I also want to send logs to Chainsaw, if
there is a Chainsaw running.

The problem is that if there is no Chainsaw running, the SocketAppender takes
some 15 seconds in the connect() method. The result is that my script takes 15
seconds waiting for a Chainsaw that does not exist and then some 4 seconds to
actually run.

Debug showed that the SocketAppender is taking 10 seconds on
address.getHostName(), in the following line:

http://grepcode.com/file/repo1.maven.org/maven2/log4j/log4j/1.2.17/org/apache/log4j/net/SocketAppender.java#230

This is just an error log and in this case I do not care about such error,
since logs are already going to a FileAppender.

So my suggestion is that the SocketAppender should have a new property to turn
off those error messages if they are not needed, as they may hurt performance.

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