[JDK18] OutOfMemoryError from StringBuilder/HugeCapacity.java

[babsingh]

OpenJDK Tests

TEST: java/lang/StringBuilder/HugeCapacity.java

Error

[2021-11-17T18:33:52.936Z] JVMDUMP039I Processing dump event "systhrow", detail "java/lang/OutOfMemoryError" at 2021/11/17 18:33:40 - please wait.
[2021-11-17T18:33:52.936Z] JVMDUMP032I JVM requested Java dump using '/home/jenkins/workspace/Test_openjdknext_j9_sanity.openjdk_aarch64_linux_OpenJDK/aqa-tests/TKG/output_16371734171260/jdk_lang_0/work/scratch/1/javacore.20211117.18
3340.3392515.0001.txt' in response to an event
[2021-11-17T18:33:52.936Z] JVMDUMP010I Java dump written to /home/jenkins/workspace/Test_openjdknext_j9_sanity.openjdk_aarch64_linux_OpenJDK/aqa-tests/TKG/output_16371734171260/jdk_lang_0/work/scratch/1/javacore.20211117.183340.33925
15.0001.txt
[2021-11-17T18:33:52.936Z] JVMDUMP032I JVM requested Snap dump using '/home/jenkins/workspace/Test_openjdknext_j9_sanity.openjdk_aarch64_linux_OpenJDK/aqa-tests/TKG/output_16371734171260/jdk_lang_0/work/scratch/1/Snap.20211117.183340
.3392515.0002.trc' in response to an event
[2021-11-17T18:33:52.936Z] JVMDUMP010I Snap dump written to /home/jenkins/workspace/Test_openjdknext_j9_sanity.openjdk_aarch64_linux_OpenJDK/aqa-tests/TKG/output_16371734171260/jdk_lang_0/work/scratch/1/Snap.20211117.183340.3392515.0
002.trc
[2021-11-17T18:33:52.936Z] JVMDUMP013I Processed dump event "systhrow", detail "java/lang/OutOfMemoryError".
[2021-11-17T18:33:52.936Z] java.lang.UnsupportedOperationException
[2021-11-17T18:33:52.936Z]      at HugeCapacity$MyHugeCharSeq.charAt(HugeCapacity.java:100)
[2021-11-17T18:33:52.936Z]      at java.base/java.lang.AbstractStringBuilder.appendChars(AbstractStringBuilder.java:1782)
[2021-11-17T18:33:52.936Z]      at java.base/java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:675)
[2021-11-17T18:33:52.936Z]      at java.base/java.lang.StringBuilder.append(StringBuilder.java:214)
[2021-11-17T18:33:52.936Z]      at java.base/java.lang.StringBuilder.append(StringBuilder.java:87)
[2021-11-17T18:33:52.936Z]      at java.base/java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:616)
[2021-11-17T18:33:52.936Z]      at java.base/java.lang.StringBuilder.append(StringBuilder.java:205)
[2021-11-17T18:33:52.936Z]      at java.base/java.lang.StringBuilder.append(StringBuilder.java:87)
[2021-11-17T18:33:52.936Z]      at java.base/java.lang.AbstractStringBuilder.<init>(AbstractStringBuilder.java:148)
[2021-11-17T18:33:52.937Z]      at java.base/java.lang.StringBuilder.<init>(StringBuilder.java:139)
[2021-11-17T18:33:52.937Z]      at HugeCapacity.testHugeInitialCharSequence(HugeCapacity.java:90)
[2021-11-17T18:33:52.937Z]      at HugeCapacity.main(HugeCapacity.java:46)
[2021-11-17T18:33:52.937Z]      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[2021-11-17T18:33:52.937Z]      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:76)
[2021-11-17T18:33:52.937Z]      at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:52)
[2021-11-17T18:33:52.937Z]      at java.base/java.lang.reflect.Method.invoke(Method.java:577)
[2021-11-17T18:33:52.937Z]      at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
[2021-11-17T18:33:52.937Z]      at java.base/java.lang.Thread.run(Thread.java:884)
[2021-11-17T18:33:52.937Z] java.lang.RuntimeException: 1 tests failed
[2021-11-17T18:33:52.937Z]      at HugeCapacity.main(HugeCapacity.java:48)
[2021-11-17T18:33:52.937Z]      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[2021-11-17T18:33:52.937Z]      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:76)
[2021-11-17T18:33:52.937Z]      at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:52)
[2021-11-17T18:33:52.937Z]      at java.base/java.lang.reflect.Method.invoke(Method.java:577)
[2021-11-17T18:33:52.937Z]      at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
[2021-11-17T18:33:52.937Z]      at java.base/java.lang.Thread.run(Thread.java:884)

Related: #13946

[babsingh]

As per adoptium/aqa-tests#2141:

StringBuilder/HugeCapacity.java is not compatible with OpenJ9.
a) It requires -XX:+CompactStrings to be the default.
b) It assumes new byte[Integer.MAX_VALUE] throws OOM, but OpenJ9
supports this.

The test exists prior to Java 16, but contains @ignore so doesn't run.
From Java 16 it contains @requires (sun.arch.data.model == "64" & os.maxMemory >= 6G).

Test code: https://github.com/ibmruntimes/openj9-openjdk-jdk/blob/openj9/test/jdk/java/lang/StringBuilder/HugeCapacity.java#L43-L46

#10582 fails at HugeCapacity.testLatin1 but this issue fails at HugeCapacity.testHugeInitialCharSequence after invoking HugeCapacity.testLatin1. OOM is thrown at different points. @pshipton Can this issue be considered a duplicate of #10582?

[pshipton]

Can this issue be considered a duplicate of #10582?

Sure, it could if #10582 was updated, but you've already created this issue. Seems we can update the exclude list to have the correct permanent excludes and then close this.

[pshipton]

i.e. if the test class contains more than one test now they both need to be excluded like
java/lang/StringBuilder/HugeCapacity.java#testLatin1
java/lang/StringBuilder/HugeCapacity.java#testHugeInitialCharSequence

I also note the exclude list contains two copies of java/lang/StringBuilder/HugeCapacity.java

[babsingh]

Excluding StringBuilder/HugeCapacity sub-tests does not work. The original exclude was kept, and the duplicate exclude was removed.

Related:

• Update JDK18 test exclude list adoptium/aqa-tests#3211
• Update jdk.test.lib.Platform to work with J9 ibmruntimes/openj9-openjdk-jdk18#5 (comment)
• [JDK18] Correctly exclude StringBuilder/HugeCapacity adoptium/aqa-tests#3220