[jira] [Created] (LOG4J2-2829) TcpSocketManager.write swallows IOException when retry = false or reconnector != null

["Mihail (Jira)" <ji...@apache.org>]

Mihail created LOG4J2-2829:
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             Summary: TcpSocketManager.write swallows IOException when retry = false or reconnector != null
                 Key: LOG4J2-2829
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2829
             Project: Log4j 2
          Issue Type: Bug
          Components: Appenders
    Affects Versions: 2.12.1
            Reporter: Mihail


Hi, I see very stange behavior when using tcp SocketAppender. My configuration is:

<Socket name="auditSocket" protocol="TCP" host="10.8.84.194" port="4587" connectTimeoutMillis="10000" reconnectionDelayMillis="10000"
 immediateFail="true" immediateFlush="true" ignoreExceptions="false" bufferedIO="false">

After application starts and before writing any logs I simulate connection reset with:

iptables -A OUTPUT -p tcp -d 10.8.84.194 --dport 4587 -j REJECT --reject-with tcp-reset

Now the strange part:
 # First log is written to output stream successfully (but nothing actually gets sent)
 # Second log throws IOException on outputstream write, this gets handled with a reconnection attempt (which fails) and result is AppenderLoggingException - this is what I expect because I'm using a failover appender to route the log into file.
 # Third and subsequent log attempts also fail due to IOException on outputstream write BUT no AppenderLoggingException is raised - reconnector is not null at this point and IOException gets swallowed up.

 

I'm using log4j2 2.12.1

 

 



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