Sorry, my bad. We had a couple of servers on the network with older versions of 
jgroups running.

JGroups 2.2.9 beta works without errors on Oracle9ias. However, when we load 
test the application we are seeing some really long GCs, sometimes up to about 
1 minute. We haven't seen GCs that long in reference tests with JBossCache 
1.2/JGroups 2.2.7. I include parts of the GC details for one JVM below.

Do you have any advice on how to reduce the size of the full GCs as a time 
consuming full GC is potentially dangerous in a heavily loaded cluster? For 
example do you recommend a minimum / maximum heap size?

Henrik

7980.880: [GC 386964K->381686K(391680K), 0.0263480 secs]
  | 7981.282: [GC 387310K->259312K(391680K), 0.0353464 secs]
  | 7989.759: [GC 387308K->382540K(391680K), 0.0234982 secs]
  | 7990.270: [GC 388108K->260081K(391616K), 0.1073189 secs]
  | 7998.600: [GC 387946K->382372K(391680K), 0.0274303 secs]
  | 7999.006: [GC 388248K->260499K(391680K), 0.2104827 secs]
  | 8008.546: [GC 388499K->380812K(391680K), 0.0330122 secs]
  | 8009.059: [GC 388876K->260654K(391680K), 0.0373310 secs]
  | 8016.914: [GC 388654K->381819K(391744K), 0.0269610 secs]
  | 8017.350: [GC 388923K->260872K(391744K), 0.0361114 secs]
  | 8025.977: [GC 388996K->383922K(391744K), 0.0357079 secs]
  | 8026.505: [GC 390194K->262229K(391488K), 0.0465966 secs]
  | 8034.697: [GC 389845K->384777K(391488K), 0.0267460 secs]
  | 8035.167: [GC-- 390665K->390973K(391488K), 0.0498293 secs]
  | 8035.217: [Full GC[Unloading class 
sun.reflect.GeneratedSerializationConstructorAccessor2]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor4]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor41]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor68]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor66]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor5]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor1]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor39]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor6]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor14]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor3]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor43]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor44]
  | [Unloading class sun.reflect.GeneratedConstructorAccessor5]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor67]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor40]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor21]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor26]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor17]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor69]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor18]
  | [Unloading class sun.reflect.GeneratedMethodAccessor1]
  |  390973K->173698K(391360K), 71.3795917 secs]
  | 8134.036: [GC 301055K->294782K(391360K), 2.0591646 secs]
  | 8136.878: [GC 302885K->175744K(391104K), 0.2426461 secs]
  | 8145.522: [GC 302592K->292696K(391104K), 0.0309871 secs]
  | 8145.975: [GC 302936K->175917K(391104K), 0.1553561 secs]
  | 8150.412: [GC 302765K->292486K(391104K), 0.0372722 secs]
  | 8150.921: [GC 303558K->176629K(391104K), 0.1419030 secs]
  | 8154.990: [GC 303475K->292839K(391104K), 0.0210634 secs]
  | 8155.443: [GC 304542K->177703K(391040K), 0.1337076 secs]
  | 8159.912: [GC 304423K->292588K(391168K), 0.0207514 secs]
  | 8160.363: [GC 304749K->178122K(391168K), 0.0765179 secs]
  | 8164.437: [GC 305081K->293849K(391168K), 0.0354192 secs]
  | 8164.872: [GC 305944K->178964K(391168K), 0.0812544 secs]
  | 8170.419: [GC 305930K->295510K(391168K), 0.0236516 secs]
  | 8170.949: [GC 306710K->179610K(391104K), 0.0316527 secs]
  | 8177.037: [GC 306455K->298033K(391168K), 0.0323191 secs]
  | 8177.069: [Full GC[Unloading class sun.reflect.GeneratedMethodAccessor2]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor19]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor22]
  | [Unloading class sun.reflect.GeneratedMethodAccessor3]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor34]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor29]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor33]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor20]
  | [Unloading class sun.reflect.GeneratedMethodAccessor19]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor23]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor31]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor36]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor24]
  | [Unloading class sun.reflect.GeneratedMethodAccessor16]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor27]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor25]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor32]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor35]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor42]
  | [Unloading class sun.reflect.GeneratedSerializationConstructorAccessor30]
  |  298033K->173099K(391168K), 28.4294364 secs]
  | 8211.966: [GC 300071K->295289K(391168K), 0.0255963 secs]
  | 8212.322: [GC 301548K->174535K(391104K), 0.0273272 secs]
  | 8219.020: [GC 301383K->296205K(391104K), 0.0248468 secs]
  | 8219.289: [GC 301387K->174606K(391040K), 0.0290517 secs]

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