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  1. JDK
  2. JDK-8080976

Unexpected AIOOB thrown from 1.9.0-ea-b64 on (regression)

    Details

    • Subcomponent:
    • Introduced In Build:
      b64
    • Resolved In Build:
      b69
    • CPU:
      x86_64
    • OS:
      linux
    • Verification:
      Verified

      Backports

        Description

        FULL PRODUCT VERSION :
        java version "1.9.0-ea"
        Java(TM) SE Runtime Environment (build 1.9.0-ea-b65)
        Java HotSpot(TM) 64-Bit Server VM (build 1.9.0-ea-b65, mixed mode)


        FULL OS VERSION :
        Checked on Windows and Linux, 64-bit. Same behavior.

        A DESCRIPTION OF THE PROBLEM :
        Expected behavior:
          The code re-reads a valid bz2 resource, looping and printing (infinitely):
          Round...
          Round...
          Round...

        Actual behavior (64-Bit Server VM, build 1.9.0-ea-b64, mixed mode):
          Round...
          Round...
          Round...
          Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 314297
                  at org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream.setupBlock(BZip2CompressorInputStream.java:820)

        Definitely something with the compilation because disabling loop
        unrolling (or running in interpreted mode) doesn't trigger the bug.


        THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: No

        THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Yes

        REGRESSION. Last worked in version 8u45

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        The bug repro code is at the link below:
        http://download.carrotsearch.com/jvm/repro.zip

        - Self contained maven project (copied commons compress sources so that one can
          tweak them if needed). An additional bz2 resource is needed (included).
        - (optionally) build with:
          mvn package
        - Run with:
          java -jar target/Repro-0.0.0.jar
        - Running in interpreted mode does *not* cause any error:
          java -Xint -jar target/Repro-0.0.0.jar
        - Running without loop unrolls does *not* cause any error:
          java -Xbatch -XX:LoopUnrollLimit=0 -jar target/Repro-0.0.0.jar

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        The program should run without AIOOBs, the input is valid.
        ERROR MESSAGES/STACK TRACES THAT OCCUR :
          Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 314297
                  at org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream.setupBlock(BZip2CompressorInputStream.java:820)

        (the index does vary from run to run).

        REPRODUCIBILITY :
        This bug can be reproduced always.

        ---------- BEGIN SOURCE ----------
        Source code in the ZIP link pasted above (not a trivial snippet).
        ---------- END SOURCE ----------

        CUSTOMER SUBMITTED WORKAROUND :
        Disable loop unrolling. Run in interpreted mode.

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                • Assignee:
                  roland Roland Westrelin
                  Reporter:
                  webbuggrp Webbug Group
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                  • Created:
                    Updated:
                    Resolved: