aarch64: extended.functional: Test 207: Create a non-persistent cache, "hung"

[andrew-m-leonard]

Failure link

https://ci.adoptopenjdk.net/job/Test_openjdk11_j9_extended.functional_aarch64_linux/14/console
testSCCMLTests5_1

02:24:20  openjdk version "11.0.9" 2020-10-20
02:24:20  OpenJDK Runtime Environment Openj9 (build 11.0.9+10-202010112343)
02:24:20  Eclipse OpenJ9 VM Openj9 (build master-ad71f4fa5, JRE 11 Linux aarch64-64-Bit Compressed References 20201011_514 (JIT enabled, AOT enabled)
02:24:20  OpenJ9   - ad71f4fa5
02:24:20  OMR      - cfd55882d
02:24:20  JCL      - cf49ddabb9 based on jdk-11.0.9+10)

Hang:

06:33:33  Testing: Test 207: Create a non-persistent cache
06:33:33  Test start time: 2020/10/12 05:33:33 Coordinated Universal Time
06:33:33  Running command: "/home/jenkins/workspace/Test_openjdk11_j9_extended.functional_aarch64_linux/openjdkbinary/j2sdk-image/bin/java"  -Xcompressedrefs -Xjit -Xgcpolicy:gencon  -Xtrace:print=j9prt.700 -Xshareclasses:name=ShareClassesCMLTests,nonpersistent -version
06:33:33  Time spent starting: 1 milliseconds
06:43:48  ***[TEST INFO 2020/10/12 05:43:33] ProcessKiller detected a timeout after 600000 milliseconds!***
06:43:48  INFO: getUnixPID() has failed indicating this is not a UNIX System.'Debug on timeout' is currently only supported on Linux.
06:43:48  
06:43:48  

[pshipton]

@knn-k

[hangshao0]

See infra issue: adoptium/infrastructure#1579

[pshipton]

Also seems a dup of #10741

FYI https://openj9.slack.com/archives/C8312LCV9/p1602551615048900

there’s a pthread_cond_signal bug affecting glibc 2.27. Worth being aware of this if unexplained deadlocks are occurring: https://sourceware.org/bugzilla/show_bug.cgi?id=25847