Hi Christian and all,
I'm experiencing a weird issue with a RestXQ service of mine which was
working and suddenly starts having problems because it just stops
serving requests.
I know about SSCE and so on but this time it's hard to reproduce.
Shortly, it receives about 5 simultaneous requests and for each of those
it calls one xquery:fork-join (5 functions) to query another service.
I cannot say what the error is exactly during the time when it is stuck.
What I can see on the client are, besides HTTP 503 and Read Timeouts,
the following logs which appear frequently but with no particular order:
ERROR: Unexpected error: java.lang.NullPointerException: Cannot invoke
"org.basex.util.hash.WeakTokenSet$WeakTokenRef.get()" because
"this.keys[index]" is null (hint:
/...y/webapp/nubisware.muscle.fiber.ccp_admin/ccp_worker_sk.xqm@65:33)
ERROR: Unexpected error: java.lang.ArrayIndexOutOfBoundsException (hint:
/.../webapp/nubisware.muscle.fiber.ccp_admin/ccp_worker_sk.xqm@65:33)
ERROR: Unexpected error: java.lang.ArrayIndexOutOfBoundsException: Index
8 out of bounds for length 8 (hint:
/.../webapp/nubisware.muscle.fiber.ccp_admin/ccp_worker_sk.xqm@65:33)
Line and column numbers point always to the same xquery:fork-join call.
Can you point me to what I should investigate? Am I hitting some
quantitative limit on concurrency? Connections?
Thank you for any help because I'm currently wandering in the darkness :-)
Regards,
Marco.
