Issues

• OpenJ9 JIT silently drops the mandatory NegativeArraySizeException for multianewarray dimensions fed by unboxed values when an earlier dimension is 0

  userRaised
  eclipse-openj9/openj9#24912 · Filter by author TemporaryRepos opened on Oct 11, 2026

• OpenJ9 JIT: lanewise vector fma propagates NaN payload and sign once compiled while the fallback path returns the default canonical qNaN — same-run COLD != HOT (Semeru 21/25; HotSpot unaffected)

  userRaised
  eclipse-openj9/openj9#24911 · Filter by author TemporaryRepos opened on Oct 11, 2026

• OpenJ9 JIT throws a spurious ArrayIndexOutOfBoundsException from a redundant (Integer) unboxing cast path when the method is compiled on first invocation (-Xjit:count=0)

  userRaised
  eclipse-openj9/openj9#24910 · Filter by author TemporaryRepos opened on Oct 10, 2026

• OpenJ9 JIT produces non-deterministic output from a deterministic fixed-seed program under the default (sampled) compilation strategy

  userRaised
  eclipse-openj9/openj9#24909 · Filter by author TemporaryRepos opened on Oct 10, 2026

• cmdLineTester_jfr_0 j9vm.760 - Error writing JFR chunk; error=2, Failure condition was found: [Output match: Error writing JFR chunk]

  comp:vmjfrtest failure
  eclipse-openj9/openj9#24908 · Filter by author JasonFengJ9 opened on Oct 10, 2026 · JFR Support

• Valhalla: hotspot_valhalla_runtime_j9_0 and hotspot_valhalla_runtime_j9_1 test failures

  project:valhallatest failure
  eclipse-openj9/openj9#24907 · Filter by author hangshao0 opened on Oct 9, 2026
  1

• DaaLoadTest -Xgcpolicy:balanced Segmentation error vmState=0x0002000f

  comp:gcsegfaulttest failure
  eclipse-openj9/openj9#24904 · Filter by author JasonFengJ9 opened on Oct 9, 2026

• Add GC strong-root scanning support for JVMTI value-type object tag table

  comp:gcjdk-headproject:valhalla
  eclipse-openj9/openj9#24903 · Filter by author harship04 opened on Oct 9, 2026
  2

• Two inconsistencies in requireNonNull pattern comments

  comp:jituserRaised
  eclipse-openj9/openj9#24901 · Filter by author liulingjing055 opened on Oct 9, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh
  1

• x86 inliner crash compiling String.compareTo

  comp:jit
  eclipse-openj9/openj9#24900 · Filter by author 0xdaryl opened on Oct 9, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh
  1

  

• DDR test failure - InvalidDataTypeException: U64 contains value larger than Long.MAX_VALUE

  comp:rascomp:vmtest failure
  eclipse-openj9/openj9#24899 · Filter by author JasonFengJ9 opened on Oct 8, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh
  1

  

• Assertion failure at omr/compiler/optimizer/PreExistence.cpp:130: dest->getNumArgs() == source->getNumArgs()

  comp:jit
  eclipse-openj9/openj9#24898 · Filter by author saad-ibm opened on Oct 8, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh

• dacapo-pmd_0 Digest validation failed for pmd-report.txt

  comp:testtest failure
  eclipse-openj9/openj9#24896 · Filter by author JasonFengJ9 opened on Oct 8, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh

• jdk_restricted_security_0 openj9/internal/security/TestProviders.java RuntimeException: The requested restricted security profile RestrictedSecurity.TestBase.Version expired on 2026-09-21

  comp:cryptocomp:testtest failure
  eclipse-openj9/openj9#24895 · Filter by author JasonFengJ9 opened on Oct 8, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh

• Valhalla: NonZeroIdentityHashCodeTest failed with RuntimeException

  jdk-headproject:valhallatest failure
  eclipse-openj9/openj9#24884 · Filter by author hangshao0 opened on Oct 7, 2026 · Java 28
  2

  

• jdk_jfr_J9_0 jdk/jfr/jcmd/TestJcmdDump.java Missing RunningEvent from running recording

  comp:vmjfrtest failure
  eclipse-openj9/openj9#24883 · Filter by author JasonFengJ9 opened on Oct 7, 2026 · JFR Support

• [J9Simplifier] Clarify whether "ibyteswap" refers to the matched pattern or generated IL

  comp:jittech debtuserRaised
  eclipse-openj9/openj9#24880 · Filter by author liulingjing055 opened on Oct 7, 2026
  1

• Attach API semaphore handle not freed at shutdown under -Xcheck:memory

  comp:vm
  eclipse-openj9/openj9#24875 · Filter by author tomal-majumder opened on Oct 6, 2026

• serviceability_jvmti_j9_0 serviceability/jvmti/8036666/GetObjectLockCount.java timed out

  test failuretimeout
  eclipse-openj9/openj9#24871 · Filter by author JasonFengJ9 opened on Oct 6, 2026

• Math.hypot clears the sign bit of NaN results in JIT-compiled code for negative-side NaN inputs while the interpreter preserves it (OpenJ9 11/17)

  comp:jituserRaised
  eclipse-openj9/openj9#24857 · Filter by author TemporaryRepos opened on Oct 5, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh
  1

• Math.max/min observable NaN bit pattern changes after JIT compilation (interpreter returns non-quieted sNaN, JIT returns quieted NaN) — OpenJ9 11-25

  comp:jituserRaised
  eclipse-openj9/openj9#24856 · Filter by author TemporaryRepos opened on Oct 5, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh
  1

• Math.fma result changes after JIT compilation: interpreted path returns a canonical +NaN (payload lost) while the JIT fma intrinsic preserves the negative NaN's full payload (OpenJ9 11-25)

  comp:jituserRaised
  eclipse-openj9/openj9#24855 · Filter by author TemporaryRepos opened on Oct 5, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh
  2

• Math.abs(double) result changes after JIT compilation: interpreter preserves a negative NaN's sign bit, JIT fabs clears it (OpenJ9 11/17)

  comp:jituserRaised
  eclipse-openj9/openj9#24854 · Filter by author TemporaryRepos opened on Oct 5, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh
  1

• Internal packages should not be included in published javadocs

  eclipse-openj9/openj9#24842 · Filter by author keithc-ca opened on Sep 30, 2026
  2

• openJcePlusTests_0 testDefaultSecureRandom/testDefaultSecureRandomFIPS SecureRandom not SunJCE

  comp:cryptotest failure
  eclipse-openj9/openj9#24835 · Filter by author JasonFengJ9 opened on Sep 29, 2026 · Release 0.64 (Java 8, 11, 17, 21, 25, 27) Jan refresh
  5