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SplittableRandomTest.java imtermittently timeout #428

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sendaoYan opened this issue Nov 4, 2022 · 3 comments
Closed

SplittableRandomTest.java imtermittently timeout #428

sendaoYan opened this issue Nov 4, 2022 · 3 comments
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enhancement New feature or request

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@sendaoYan
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Description
jdk/test/java/util/SplittableRandom/SplittableRandomTest.java imtermittently timeout.
When the /dev/random is empty, then this testcase will run timeout

Steps to Reproduce
Steps to reproduce the behavior:

timeout 10 wc -l /dev/random
cat /proc/sys/kernel/random/entropy_avail
jtreg -timeout:0.1 -nr -w tmp -v:fail,error jdk/test/java/util/SplittableRandom/SplittableRandomTest.java

result:

"MainThread" #26 prio=5 os_prio=0 tid=0x0000ffff94402000 nid=0xc7ad8 runnable [0x0000fffe55f3a000]
   java.lang.Thread.State: RUNNABLE
        at java.io.FileInputStream.readBytes(Native Method)
        at java.io.FileInputStream.read(FileInputStream.java:255)
        at sun.security.provider.NativePRNG$RandomIO.readFully(NativePRNG.java:424)
        at sun.security.provider.NativePRNG$RandomIO.implGenerateSeed(NativePRNG.java:441)
        - locked <0x000000008274c7e8> (a java.lang.Object)
        at sun.security.provider.NativePRNG$RandomIO.access$500(NativePRNG.java:331)
        at sun.security.provider.NativePRNG.engineGenerateSeed(NativePRNG.java:226)
        at java.security.SecureRandom.generateSeed(SecureRandom.java:533)
        at java.security.SecureRandom.getSeed(SecureRandom.java:520)
        at java.util.concurrent.ThreadLocalRandom.initialSeed(ThreadLocalRandom.java:141)
        at java.util.concurrent.ThreadLocalRandom.<clinit>(ThreadLocalRandom.java:136)
        at java.util.concurrent.ForkJoinPool.externalPush(ForkJoinPool.java:2401)
        at java.util.concurrent.ForkJoinTask.fork(ForkJoinTask.java:702)
        at java.util.stream.ForEachOps$ForEachTask.compute(ForEachOps.java:306)
        at java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:731)
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
        at java.util.concurrent.ForkJoinTask.doInvoke(ForkJoinTask.java:401)
        at java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:734)
        at java.util.stream.ForEachOps$ForEachOp.evaluateParallel(ForEachOps.java:159)
        at java.util.stream.ForEachOps$ForEachOp$OfDouble.evaluateParallel(ForEachOps.java:230)
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:233)
        at java.util.stream.DoublePipeline.forEach(DoublePipeline.java:393)
        at java.util.stream.DoublePipeline$Head.forEach(DoublePipeline.java:587)
        at SplittableRandomTest.testBoundedDoubles(SplittableRandomTest.java:488)

Expected behavior
image

JDK version
image

Execution environment

image
@sendaoYan sendaoYan self-assigned this Nov 4, 2022
@sendaoYan sendaoYan added the enhancement New feature or request label Nov 4, 2022
@sendaoYan
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This was referenced Nov 4, 2022
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sendaoYan added a commit that referenced this issue Nov 4, 2022
@sendaoYan
[Misc] fix SplittableRandomTest.java intermittently timeout
77f1417 
Summary: fix jdk/test/java/util/SplittableRandom/SplittableRandomTest.java intermittently fail, use /dev/urandom instead of /dev/random to avoid block for SecureRandom API

Test Plan: CI pipeline

Reviewed-by: lvfei.lv, lei.yul

Issue: #428
@sendaoYan
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image

sendaoYan added a commit that referenced this issue Nov 4, 2022
@sendaoYan
[Misc] fix SplittableRandomTest.java intermittently timeout
68c98c3 
Summary: fix jdk/test/java/util/SplittableRandom/SplittableRandomTest.java intermittently fail, use /dev/urandom instead of /dev/random to avoid block for SecureRandom API

Test Plan: CI pipeline

Reviewed-by: lvfei.lv, lei.yul

Issue: #428
@sendaoYan
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http://ci.dragonwell-jdk.io/job/Test_openjdk8_dragonwell_sanity.openjdk_aarch64_linux/276/consoleFull

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