Seems to have started with this [commit|https://spruce.mongodb.com/version/sys_perf_c122b0ea6e6971d59f57e6b0c91f4caaa36fb765/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC.]   

 

 

Here is an example performance run.  (https://spruce.mongodb.com/task/sys_perf_disagg_perf_11_node.arm.aws_ycsb.out_of_cache.100read.2024_05_c122b0ea6e6971d59f57e6b0c91f4caaa36fb765_26_02_03_04_11_35/tests?execution=0&sorts=STATUS%3AASC)

The error usually contains the following error in mongod.log.

 

{"t":

{"$date":"2026-02-04T20:22:31.809+00:00"}

,"s":"F",  "c":"CONTROL",  "id":6384300, "ctx":"TimestampMonitor","msg":"Writing fatal message","attr":{"message":"Invalid access at address: 0\n"}}

{"t":

{"$date":"2026-02-04T20:22:31.809+00:00"}

,"s":"F",  "c":"CONTROL",  "id":6384300, "ctx":"TimestampMonitor","msg":"Writing fatal message","attr":{"message":"Dumping siginfo (si_code=1): 0b 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n"}}

{"t":

{"$date":"2026-02-04T20:22:31.809+00:00"}

,"s":"F",  "c":"CONTROL",  "id":6384300, "ctx":"TimestampMonitor","msg":"Writing fatal message","attr":{"message":"Got signal: 11 (Segmentation fault).\n"}}

{"t":

{"$date":"2026-02-04T20:22:31.813+00:00"}

,"s":"I",  "c":"NETWORK",  "id":6788700, "ctx":"conn28","msg":"Received first command on ingress connection since session start or auth handshake","attr":{"elapsedMillis":15}}

{"t":

{"$date":"2026-02-04T20:22:31.814+00:00"}

,"s":"I",  "c":"ACCESS",   "id":5286306, "ctx":"conn29","msg":"Successfully authenticated","attr":{"client":"10.2.4.28:56558","isSpeculative":true,"isClusterMember":false,"mechanism":"SCRAM-SHA-256","user":"username","db":"admin","result":0,"metrics":{"conversation_duration":{"micros":10750,"summary":{"0":

{"step":1,"step_total":2,"duration_micros":34}

,"1":{"step":2,"step_total":2,"duration_micros":14}}}},"doc":{"driver":

{"name":"mongo-java-driver|sync","version":"4.7.0"}

,"os":{"type":"Linux","name":"Linux","architecture":"aarch64","version":"6.1.141-155.222.2.mdb.amzn2023.aarch64"},"platform":"Java/Oracle Corporation/19.0.1+10-21"},"extraInfo":{}}}

{"t":

{"$date":"2026-02-04T20:22:31.818+00:00"}

,"s":"I",  "c":"NETWORK",  "id":6788700, "ctx":"conn29","msg":"Received first command on ingress connection since session start or auth handshake","attr":{"elapsedMillis":3}}

{"t":

{"$date":"2026-02-04T20:22:31.825+00:00"}

,"s":"I",  "c":"CONTROL",  "id":31380,   "ctx":"TimestampMonitor","msg":"BACKTRACE","attr":{"bt":{"backtrace":[

{"a":"AAAAB13ADA0C","b":"AAAAAAAA0000","o":"690DA0C","s":"_ZN5mongo25printStructuredStackTraceEv","C":"mongo::printStructuredStackTrace()","s+":"40"}

,{"a":"AAAAB139E284","b":"AAAAAAAA0000","o":"68FE284","s":"ZN5mongo12_GLOBAL_N_115printErrorBlockEv","C":"mongo::(anonymous namespace)::printErrorBlock()","s+":"2C"},{"a":"AAAAB139E744","b":"AAAAAAAA0000","o":"68FE744","s":"abruptQuitWithAddrSignal","s+":"12C"},{"a":"FFFFF7FFB830","b":"FFFFF7FFB000","o":"830","s":"__kernel_rt_sigreturn","s+":"0"}],"processInfo":{"mongodbVersion":"8.3.0-alpha3-363-ga0fa927-patch-69828d5df1eade00078b0a30","gitVersion":"a0fa9275f9f09d247adbe3fb14a64188e1138544","compiledModules":["enterprise"],"uname":

{"sysname":"Linux","release":"6.1.141-155.222.2.mdb.amzn2023.aarch64","version":"#1 SMP Mon Jun 23 20:16:09 UTC 2025","machine":"aarch64"}

,"somap":[

{"b":"AAAAAAAA0000","path":"/media/ebs/workdir/mongodb/bin/mongod","elfType":3,"buildId":"C04FFDF0C04FFDF023C0CA53"}

,

{"b":"FFFFF7FFB000","path":"linux-vdso.so.1","elfType":3,"buildId":"49FCD88F39E948CBDCD355DF8AA87C30A1D7EC39"}

]}}},"tags":[]}

{"t":

{"$date":"2026-02-04T20:22:31.825+00:00"}

,"s":"I",  "c":"CONTROL",  "id":31445,   "ctx":"TimestampMonitor","msg":"Frame","attr":{"frame":

{"a":"AAAAB13ADA0C","b":"AAAAAAAA0000","o":"690DA0C","s":"_ZN5mongo25printStructuredStackTraceEv","C":"mongo::printStructuredStackTrace()","s+":"40"}

}}

{"t":

{"$date":"2026-02-04T20:22:31.825+00:00"}

,"s":"I",  "c":"CONTROL",  "id":31445,   "ctx":"TimestampMonitor","msg":"Frame","attr":{"frame":

{"a":"AAAAB139E284","b":"AAAAAAAA0000","o":"68FE284","s":"_ZN5mongo12_GLOBAL__N_115printErrorBlockEv","C":"mongo::(anonymous namespace)::printErrorBlock()","s+":"2C"}

}}

{"t":

{"$date":"2026-02-04T20:22:31.825+00:00"}

,"s":"I",  "c":"CONTROL",  "id":31445,   "ctx":"TimestampMonitor","msg":"Frame","attr":{"frame":

{"a":"AAAAB139E744","b":"AAAAAAAA0000","o":"68FE744","s":"abruptQuitWithAddrSignal","s+":"12C"}

}}

{"t":

{"$date":"2026-02-04T20:22:31.825+00:00"}

,"s":"I",  "c":"CONTROL",  "id":31445,   "ctx":"TimestampMonitor","msg":"Frame","attr":{"frame":

{"a":"FFFFF7FFB830","b":"FFFFF7FFB000","o":"830","s":"__kernel_rt_sigreturn","s+":"0"}

}}

{"t":

{"$date":"2026-02-04T20:22:31.825+00:00"}

,"s":"F",  "c":"CONTROL",  "id":6384300, "ctx":"TimestampMonitor","msg":"Writing fatal message","attr":{"message":"\n"}}

{"t":

{"$date":"2026-02-04T20:22:31.825+00:00"}

,"s":"F",  "c":"CONTROL",  "id":6384300, "ctx":"TimestampMonitor","msg":"Writing fatal message","attr":{"message":"\n"}}