Hollow related segfaut

[tcataldo]

Hi,

we are getting JVM segfaults (and hs_err_pidXXXX.log) which are always hollow related:

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007fe01714b28b, pid=15121, tid=0x00007fdefdf9a700
#
# JRE version: OpenJDK Runtime Environment (8.0_265-b01) (build 1.8.0_265-b01)
# Java VM: OpenJDK 64-Bit Server VM (25.265-b01 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# J 50879 C1 com.netflix.hollow.core.write.objectmapper.HollowObjectTypeMapper$MappedField.retrieveFieldValue(Ljava/lang/Object;[II)Ljava/lang/Object; (611 bytes) @ 0x00007fe01714b28b [0x00007fe017149580+0x1d0b]
#
# Core dump written. Default location: /var/log/core or core.15121
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
#

---------------  T H R E A D  ---------------

Current thread (0x00007fdf24c44000):  JavaThread "vert.x-worker-thread-0" [_thread_in_Java, id=16642, stack(0x00007fdefdf5a000,0x00007fdefdf9b000)]

siginfo: si_signo: 11 (SIGSEGV), si_code: 1 (SEGV_MAPERR), si_addr: 0x0000000000000014

Registers:
RAX=0x000000000000000c, RBX=0x0000000000000003, RCX=0x000000000000000a, RDX=0x0000000000000008
RSP=0x00007fdefdf98ea0, RBP=0x00007fdefdf99178, RSI=0x000000079f9c0860, RDI=0x0000000000002a78
R8 =0x0000000000000001, R9 =0x0000000000000028, R10=0x00000007c0a49000, R11=0x000000000000000a
R12=0x0000000000000000, R13=0x00007fdefdf99108, R14=0x00007fdefdf991a8, R15=0x00007fdf24c44000
RIP=0x00007fe01714b28b, EFLAGS=0x0000000000010206, CSGSFS=0x0000000000000033, ERR=0x0000000000000004
  TRAPNO=0x000000000000000e

and from the hs_err too:

Stack: [0x00007fdefdf5a000,0x00007fdefdf9b000],  sp=0x00007fdefdf98ea0,  free space=251k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
J 50879 C1 com.netflix.hollow.core.write.objectmapper.HollowObjectTypeMapper$MappedField.retrieveFieldValue(Ljava/lang/Object;[II)Ljava/lang/Object; (611 bytes) @ 0x00007fe01714b28b [0x00007fe017149580+0x1d0b]
J 50879 C1 com.netflix.hollow.core.write.objectmapper.HollowObjectTypeMapper$MappedField.retrieveFieldValue(Ljava/lang/Object;[II)Ljava/lang/Object; (611 bytes) @ 0x00007fe01714cfdc [0x00007fe017149580+0x3a5c]
J 50878 C1 com.netflix.hollow.core.write.objectmapper.HollowObjectTypeMapper.retrieveFieldValue(Ljava/lang/Object;[II)Ljava/lang/Object; (22 bytes) @ 0x00007fe013e53f6c [0x00007fe013e53d20+0x24c]
j  com.netflix.hollow.core.write.objectmapper.HollowObjectTypeMapper.extractPrimaryKey(Ljava/lang/Object;)[Ljava/lang/Object;+46
j  com.netflix.hollow.core.write.objectmapper.HollowObjectMapper.extractPrimaryKey(Ljava/lang/Object;)Lcom/netflix/hollow/core/write/objectmapper/RecordPrimaryKey;+24
j  com.netflix.hollow.api.producer.CloseableIncrementalWriteState.getKey(Ljava/lang/Object;)Lcom/netflix/hollow/core/write/objectmapper/RecordPrimaryKey;+22
j  com.netflix.hollow.api.producer.CloseableIncrementalWriteState.delete(Ljava/lang/Object;)V+3
j  net.bluemind.authentication.service.tokens.TokensStore.lambda$4(Ljava/util/Collection;Lcom/netflix/hollow/api/producer/HollowProducer$Incremental$IncrementalWriteState;)V+22
j  net.bluemind.authentication.service.tokens.TokensStore$$Lambda$3021.populate(Lcom/netflix/hollow/api/producer/HollowProducer$Incremental$IncrementalWriteState;)V+5
j  com.netflix.hollow.api.producer.AbstractHollowProducer.incrementalPopulate(Lcom/netflix/hollow/api/producer/ProducerListenerSupport$ProducerListeners;Lcom/netflix/hollow/api/producer/HollowProducer$Incremental$IncrementalPopulator;J)Lcom/netflix/hollow/api/producer/HollowProducer$Populator;+37
j  com.netflix.hollow.api.producer.AbstractHollowProducer.populate(Lcom/netflix/hollow/api/producer/ProducerListenerSupport$ProducerListeners;Lcom/netflix/hollow/api/producer/HollowProducer$Incremental$IncrementalPopulator;Lcom/netflix/hollow/api/producer/HollowProducer$Populator;J)V+53
j  com.netflix.hollow.api.producer.AbstractHollowProducer.runCycle(Lcom/netflix/hollow/api/producer/ProducerListenerSupport$ProducerListeners;Lcom/netflix/hollow/api/producer/HollowProducer$Incremental$IncrementalPopulator;Lcom/netflix/hollow/api/producer/HollowProducer$Populator;Lcom/netflix/hollow/api/producer/Status$StageWithStateBuilder;J)J+26

Our object model is pretty simple:

@HollowPrimaryKey(fields = { "key" })
public class Token {

	public String key;

	public String subjectUid;

	public String subjectDomain;

	public long expiresTimestamp;

	public Token(String key, String subject, String subjectDomain) {
		this.key = key;
		this.subjectUid = subject;
		this.subjectDomain = subjectDomain;
		expiresTimestamp = System.currentTimeMillis() + TimeUnit.DAYS.toMillis(7);
	}

	public void renew() {
		expiresTimestamp = expiresTimestamp + TimeUnit.DAYS.toMillis(7);
	}
}

Any hint at what we should look at or if we are hitting an hollow bug ?