ARROW-6206: [Java][Docs] Document environment variables/java properties #5078
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emkornfield
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Aug 14, 2019
Co-Authored-By: emkornfield <[email protected]>
Co-Authored-By: emkornfield <[email protected]>
Co-Authored-By: emkornfield <[email protected]>
Co-Authored-By: emkornfield <[email protected]>
Co-Authored-By: emkornfield <[email protected]>
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Thanks for suggestions, checked in. |
dongjoon-hyun
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Nov 16, 2019
… Arrow on JDK9+ ### What changes were proposed in this pull request? This PR aims to add `io.netty.tryReflectionSetAccessible=true` to the testing configuration for JDK11 because this is an officially documented requirement of Apache Arrow. Apache Arrow community documented this requirement at `0.15.0` ([ARROW-6206](apache/arrow#5078)). > #### For java 9 or later, should set "-Dio.netty.tryReflectionSetAccessible=true". > This fixes `java.lang.UnsupportedOperationException: sun.misc.Unsafe or java.nio.DirectByteBuffer.(long, int) not available`. thrown by netty. ### Why are the changes needed? After ARROW-3191, Arrow Java library requires the property `io.netty.tryReflectionSetAccessible` to be set to true for JDK >= 9. After #26133, JDK11 Jenkins job seem to fail. - https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Test%20(Dashboard)/job/spark-master-test-maven-hadoop-3.2-jdk-11/676/ - https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Test%20(Dashboard)/job/spark-master-test-maven-hadoop-3.2-jdk-11/677/ - https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Test%20(Dashboard)/job/spark-master-test-maven-hadoop-3.2-jdk-11/678/ ```scala Previous exception in task: sun.misc.Unsafe or java.nio.DirectByteBuffer.<init>(long, int) not available io.netty.util.internal.PlatformDependent.directBuffer(PlatformDependent.java:473) io.netty.buffer.NettyArrowBuf.getDirectBuffer(NettyArrowBuf.java:243) io.netty.buffer.NettyArrowBuf.nioBuffer(NettyArrowBuf.java:233) io.netty.buffer.ArrowBuf.nioBuffer(ArrowBuf.java:245) org.apache.arrow.vector.ipc.message.ArrowRecordBatch.computeBodyLength(ArrowRecordBatch.java:222) ``` ### Does this PR introduce any user-facing change? No. ### How was this patch tested? Pass the Jenkins with JDK11. Closes #26552 from dongjoon-hyun/SPARK-ARROW-JDK11. Authored-by: Dongjoon Hyun <[email protected]> Signed-off-by: Dongjoon Hyun <[email protected]>
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Related to ARROW-6206.
Specifically, "-Dio.netty.tryReflectionSetAccessible=true" for JVMs >= 9 and BoundsChecking/NullChecking for get.