PIT
they happened on Linux-x86/x64

output's tail

.......................
 999: 0: 0.04%: 811863588: java.lang.Cloneable, loader NULL class_loader
1000:
1001: 0: 0.01%: 196567318: java.lang.invoke.MethodType$ConcurrentWeakInternSet, loader NULL class_loader
1002:
1003:
1004:
1005: 0: 0.01%: 213403496: java.lang.module.ModuleDescriptor$Version, loader NULL class_loader
1006: 0: 0.01%: 997595270: java.security.CodeSource, loader NULL class_loader
1007:
1008: 0: 0.01%: 134024460: java.util.concurrent.ConcurrentHashMap$EntryIterator, loader NULL class_loader

Top 16 buckets:
 781: hits 0.22%
 729: hits 0.28%
 338: hits 0.23%
 836: hits 29.88%
 490: hits 6.10%
 910: hits 6.71%
 635: hits 0.23%
 959: hits 43.44%
 986: hits 0.48%
 458: hits 0.62%
 686: hits 0.21%
  99: hits 0.72%
 141: hits 0.80%
 979: hits 0.19%
  14: hits 0.17%
  14: hits 0.17%

Protection domain cache table (table_size=137, classes=1)
entry 0xca9e9d50 value 0xd227fae0 strongly_reachable 0 next 0x00000000
Test failed: encountered substring "error" in java output

It seems like the test find string 'error' in output strings such
[2016-09-17T16:22:03.66] 130: 0: 0.02%: 740605121: java.lang.Error, loader NULL class_loader
[2016-09-17T16:22:03.66] 188: 0: 0.01%: 1026112828: java.lang.NoClassDefFoundError, loader NULL class_loader
[2016-09-17T16:22:03.66] 323: 0: 0.01%: 958953923: java.lang.OutOfMemoryError, loader NULL class_loader
etc.