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(Answer) (Category) Java Apache Project : (Category) Apache JServ 1.0 : (Category) Configuration :
Java VM not responding - EMERGENCY: ajp12: ping no reply
Problem: you get the message 
    Java VM not responding - EMERGENCY: ajp12: ping no reply
  and jserv is not starting any servlet
Cause: you have forgotten an older version of the jserv-jar file 
  still around somewhere in your classpath (in jdk/jre/lib/ext
  for jdk-2 for example).
Solution: remove the old jar-file and everything should work fine 
  (it does for me now at least).
You can identify this type of problem in your jserv logs: jserv outputs a 
  [02/10/1999 12:04:47:505 CEST] ApacheJServ/1.1b1 is starting...
message now (older versions doesnt seem to do so). If you get this message (and 1.1b1 is the version you want to run) this obviously NOT your problem.
LarsDOTSchmidt-ThiemeATwiwiDOTuni-karlsruheDOTde
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Please browse the categories below to previous answers to questions like yours. If you do not find the answer for your particular situation, ask for help on the appropriate mailing list.