Re: Having trouble getting XMLSocketAppender to reconnect

Matthew Bingham <texbingham <at> gmail.com> writes:

> 
> I have been using XMLSocketAppender without much issue, except for when the 
connection is lost log4cxx is never reconnecting.  I have ReconnectionDelay 
set to 1000 and when the connection goes I see log4cxx display "log4cxx: 
Detected problem with connection: log4cxx: IO Exception : status code = 
730053"  This is with a 64 bit build with VS2008.  I configure log4cxx from an 
xml file and in the the source just calllogger_ = Logger::getLogger
("Server");LOG4CXX_DEBUG(logger_,"Server logging");      Any suggestions?  
Below is the log4cxx debug information.  Thanks.  log4cxx: Threshold ="".
> log4cxx: Level value for root is [all].log4cxx: OptionConverter::toLevel: no 
class name specified, level=[all]log4cxx: root level set to ALLlog4cxx: 
Retreiving an instance of Logger.log4cxx: Setting [Server] additivity to 
[true].
> log4cxx: Level value for Server is [debug].log4cxx: 
OptionConverter::toLevel: no class name specified, level=[debug]log4cxx: 
Server level set to DEBUGlog4cxx: Class name: 
[org.apache.log4j.net.XMLSocketAppender]
> log4cxx: Setting option name=[Port], value=[12345]log4cxx: Setting option 
name=[RemoteHost], value=[192.168.1.102]log4cxx: Setting option name=
[ReconnectionDelay], value=[1000]log4cxx: Setting option name=[LocationInfo], 
value=[true]
> log4cxx: Parsing layout of class: "org.apache.log4j.PatternLayout"log4cxx: 
Setting option name=[ConversionPattern], value=[%d %-5p [%c] %m%n]log4cxx: 
Adding appender named [MyXmlAppenderFormated] to logger [Server].
> log4cxx: Retreiving an instance of Logger.log4cxx: Setting 
[multicastListener] additivity to [true].log4cxx: Level value for 
multicastListener is [warn].log4cxx: OptionConverter::toLevel: no class name 
specified, level=[warn]

Concurrent access

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Re: Concurrent access

Guten Tag drkmkzs,
am Mittwoch, 22. Februar 2012 um 16:55 schrieben Sie:

> And i imagine a better approach would be to configure log4cxx within the
> code (instead property file) in order to change log file name for each
> processess ?

Not necessarily. I don't know if log4cxx properly handles concurrent
access to the same file on a per process basis, but I personally
dislike configuring log4cxx in code and in your case it wouldn't be
necessary, depending on what your really try to achieve with your log
files. If it's just about to separate the log files of more than one
instance of your program, one approach could be to provide a unique
environment variable in your program on per instance basis before
configuring log4cxx with its property or xml file, because log4cxx is
able to use environment variable in the configuration at least in
paths. I use that to distinct two calls of the same program by
different callers where the callers provide an id of who they are and
that id is set as an environment variable and used in the log
configuration as part of the path to the log file. This ID can be
whatever you like, process id, GUID, something from the caller, it all
depends on what you do with the logs.

The syntax to get something from the environment is ${something}, like
in the following example:

<appender       name="Dbxml.monthSpecificLogFile"
                class="org.apache.log4j.rolling.RollingFileAppender">
        <rollingPolicy  class="org.apache.log4j.rolling.TimeBasedRollingPolicy">
                <param  name="FileNamePattern"
                        value="..\..\..\Datenserver\Logdateien\dbxml\dbxml\${mandant}\%d{yyyy-MM}.log"
                />
        </rollingPolicy>
        <layout class="org.apache.log4j.PatternLayout">
                <param  name="ConversionPattern"
                        value="%d{yyyy-MM-dd HH:mm:ss,SSS} %p> %c.%M: %m%n"
                />
        </layout>
        <param  name="append"
                value="true"
        />
</appender>

Mit freundlichen Grüßen,

Thorsten Schöning

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Re: Concurrent access

RE: Valgrind memory issue