Debugging a java jar file -

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i have jar file , don't have source. should connect server. doesn't run @ first time , need run second time. trying find way it's logs. how can enable it's logs?

here how call it

java -xms512m -xmx512m -jar mcon.jar

i have found , tried code below think server sockets

java -xdebug -xrunjdwp:server=y,transport=dt_socket,address=4000,suspend=n -jar mcon.jar

what found correct not need address , remote debugging connect server

from command line , need is

java -agentlib:jdwp=transport=dt_shmem,address=jdbconn,server=y,suspend=n -jar mcon.jar

then can connect java debugger

jdb -attach jdbconn

you can refer doc find out command can use


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