If I change the server.xml, for example changing the saf definitions, sometimes the server abends while it is running - or when it is restarted. A subsequent restart works fine
[ERROR ] CWWKS3005E: A configuration exception has occurred. No UserRegistry implementation service is available. Ensure th
Unhandled exception
Type=Segmentation error vmState=0x00000000
J9Generic_Signal_Number=00000018 Signal_Number=0000000b Error_Value=00000000 Signal_Code=00000035
Handler1=0000005008720880 Handler2=000000500864EB40
gpr0=000000000000009A gpr1=0000000000000826 gpr2=0000000000002EE7 gpr3=000000007B373DE0
gpr4=00000051A52FD480 gpr5=0000000000004130 gpr6=0000005019E5D1C0 gpr7=000000000000009A
gpr8=0000005019E19A90 gpr9=00000050191383B0 gpr10=00000050AAA16898 gpr11=0000000014444400
gpr12=0000000014443CB8 gpr13=0000000014477D90 gpr14=0000006400000271 gpr15=00000050AAA16878
fpc=0008fe00 psw0=0785240180000000 psw1=000000007B3717E0 sp=00000051A52FD480
bea=000000007B37182C
fpr0=4140000000000000 fpr1=4004000000000000 fpr2=0000000000000000 fpr3=0000000000000000
fpr4=403dffffffffffff fpr5=4002400000000000 fpr6=fffc000000000000 fpr7=0000000000000000
fpr8=00ceebf16917a330 fpr9=000e056c2136518c fpr10=0000688c0c7de5ba fpr11=0000e838cc014749
fpr12=0001182244e87c7a fpr13=0000761c9937bbf5 fpr14=0000000000000000 fpr15=0000000000000000
vr0=41400000000000000000000000000000 vr1=40040000000000000000000000000000 vr2=0000000000000000002f002f002f002f vr3=0000000000000000
vr4=403dffffffffffffc1de10667dbeb71f vr5=4002400000000000d59587e17d86df7c vr6=fffc0000000000000000000000000000 vr7=0000000000000000
vr8=00ceebf16917a330000e056c2136518c vr9=000e056c2136518c00f6f6910a9658e7 vr10=0000688c0c7de5ba9c20e59030da917b vr11=0000e838cc0147
vr12=0001182244e87c7a19a3f747ba88318f vr13=0000761c9937bbf59e43d9d69d7a7ab9 vr14=00000000000000000000000000000000 vr15=000000000000
vr16=551d2500000000000000000000000000 vr17=551d2500000000000000000000000000 vr18=00000000000000100000000000000000 vr19=002000200020
vr20=0061007a00e000f600f800fe00000000 vr21=a000c000a000c000a000c00000000000 vr22=00df00df00b500b500ff00ff00000000 vr23=800080008000
vr24=00000000000000000000000000000000 vr25=00000000000000000000000000000000 vr26=00000000000000000000000000000000 vr27=000000000000
vr28=00000000000000000000000000000000 vr29=00000000000000000000000000000000 vr30=00000000000000000000000000000000 vr31=000000000000
Target=2_90_20190802_424001 (z/OS 02.04.00)
CPU=s390x (5 logical CPUs) (0x26a55a000 RAM)
----------- Stack Backtrace -----------
protectedIntrospectBacktraceSymbols+0xebec6cd0 (0x0000000000000000)
omrsig_protect+0xebec9fe0 (0x0000000000000000)
omrintrospect_backtrace_symbols+0xebec6dc0 (0x0000000000000000)
generateDiagnosticFiles+0x835cb650 (0x0000000000000000)
omrsig_protect+0xebec9fe0 (0x0000000000000000)
structuredSignalHandler+0x835ca388 (0x0000000000000000)
masterSynchSignalHandler+0xebece230 (0x0000000000000000)
__zerro+0xec290b70 (0x0000000000000000)
__zerros+0xec290ea0 (0x0000000000000000)
CEEHDSP+0xec76f730 (0x0000000000000000)
CEEOSIGJ+0xec4c2960 (0x0000000000000000)
CEEOSIGJ+0xec4c2960 (0x0000000000000000)
CELQHROD+0xec75bdf8 (0x0000000000000000)
CEEOSIGG+0xec4c9980 (0x0000000000000000)
CELQHROD+0xec75bdf8 (0x0000000000000000)
TR_IProfiler::parseBuffer(J9VMThread*,const unsigned char*,unsigned long,bool)+0x84c8eec8 (0x0000000000000000)
jitHookBytecodeProfiling(J9HookInterface**,unsigned long,void*,void*)+0x84f11740 (0x0000000000000000)
J9HookDispatch(J9HookInterface**,unsigned long,void*)+0xebe6e988 (0x0000000000000000)
flushBytecodeProfilingData+0x83582210 (0x0000000000000000)
bytecodeLoop+0x8354c988 (0x0000000000000000)
ZJ9SYM1+0x835ffcf8 (0x0000000000000000)
runJavaThread+0x835f3fb8 (0x0000000000000000)
javaProtectedThreadProc+0x83554618 (0x0000000000000000)
omrsig_protect+0xebec9fe0 (0x0000000000000000)
javaThreadProc+0x83550b30 (0x0000000000000000)
thread_wrapper+0xebf6af98 (0x0000000000000000)
---------------------------------------
JVMDUMP039I Processing dump event "gpf", detail "" at 2020/09/14 09:21:55 - please wait.
JVMDUMP032I JVM requested System dump using 'START1.JVM.SM.D200914.T092155.X&DS' in response to an event
IEATDUMP in progress with options SDATA=(LPA,GRSQ,LSQA,NUC,PSA,RGN,SQA,SUM,SWA,TRT)
IEATDUMP success for DSN='START1.JVM.SM.D200914.T092155.X&DS'
JVMDUMP040I System dump written to dataset(s) using name template START1.JVM.SM.D200914.T092155.X&DS
JVMDUMP032I JVM requested Java dump using '//javacore.20200914.092155.50397228.0002.txt' in response to an event
JVMDUMP010I Java dump written to //javacore.20200914.092155.50397228.0002.txt
JVMDUMP032I JVM requested Snap dump using '//Snap.20200914.092155.50397228.0003.trc' in response to an event
JVMDUMP010I Snap dump written to //Snap.20200914.092155.50397228.0003.trc
JVMDUMP007I JVM Requesting JIT dump using '//jitdump.20200914.092155.50397228.0004.dmp'
Non-Fatal Error: Unable to open file (//jitdump.20200914.092155.50397228.0004.dmp)
<?xml version="1.0" standalone="no"?>
<jitDump>
#INFO: Crashed in application thread 0000000014819600.
#INFO: Found 2 JITed methods on Java stack.
<logRecompilation>
</logRecompilation>
<logRecompilation>
------------------------------
------------------------------
------------------------------
------------------------------
and
10.21.55 STC01503 JVMDUMP039I Processing dump event "gpf", detail "" at 2020/09/14 955
955 09:21:55 - please wait.
955
10.21.55 STC01503 JVMDUMP032I JVM requested System dump using 'START1.JVM.SM.D200914.T09 956
956 2155.X&DS' in response to an event
956
If you want a dump I'll capture it next time it occurs
regards
Colin