spring - Maximum number of Quartz nodes in a cluster? -


i'm working on system uses quartz in cluster-mode , have 18 servers in cluster. problem we're facing jobs executed twice , jobs 'stuck' in acquired state or other weird issues.

i read documentation says:

the scheduler makes use of cluster-wide lock, pattern degrades performance add more nodes (when going beyond three nodes - depending upon database's capabilities, etc.).

we have lots of warnings this:

[warn o.s.s.q.localdatasourcejobstore - scheduler instance (xxx) still active recovered instance in cluster. may cause inconsistent behavior.

we have synchronized clock on machines in cluster.

my questions are:

  • does else have big cluster of quartz instances , experiences similar problems?
  • is quartz limited maximum 3-4 machines per cluster?
  • are there work-arounds this?


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