You need to increase jetty thread count to handle the high number of concurrent users and high volume of Web Service call. To increase jetty count:

  1. Go to <Adeptia installation folder>/ServerKernel/etc/jetty.
  2. Open jetty.xml file. 

  3. Increase the value of maxThreads as per your requirement.

  4. Save the file.
  5. Restart Kernel and WebRunner.