After JDK-8357282 we see a different kind of timeout. Now we are seeing dozens, if not hundreds, or the same class prepare event being fired, then the test times out:

Output overflow:
JT Harness has limited the test output to the text
at the beginning and the end, so that you can see how the
test began, and how it completed.

If you need to see more of the output from the test,
set the system property javatest.maxOutputSize to a higher
value. The current value is 100000
...

assToLoad;' (eventsCounter: 271)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 272)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 273)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 274)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 275)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 276)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 277)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 278)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 279)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 280)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 281)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 282)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 283)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 284)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 285)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 286)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 287)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 288)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 289)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 290)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 291)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 292)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 293)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 294)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 295)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 296)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 297)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 298)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 299)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 300)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 301)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 302)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 303)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 304)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 305)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 306)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Ljava/util/IdentityHashMap$IdentityHashMapIterator;' (eventsCounter: 307)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 308)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 309)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Ljava/util/IdentityHashMap$KeyIterator;' (eventsCounter: 310)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 311)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 312)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 313)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 314)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 315)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 316)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 317)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 318)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 319)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 320)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 321)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 322)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 323)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 324)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 325)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 326)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 327)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 328)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 329)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 330)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 331)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 332)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 333)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 334)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 335)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 336)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 337)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 338)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 339)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 340)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 341)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 342)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 343)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 344)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 345)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 346)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 347)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 348)
TargetApp (stdout): - attach045Agent01.cpp, 74: NativeAgent-1: ClassPrepare event received for class 'Lnsk/jvmti/AttachOnDemand/attach045/ClassToLoad;' (eventsCounter: 349)
Timeout signalled after 1200 seconds