fapifta opened a new pull request, #7135:
URL: https://github.com/apache/ozone/pull/7135
## What changes were proposed in this pull request?
During our internal testing we ran into an exception with Java 17 that
originates in ChecksumByteBufferImpl.
The exception:
<pre>java.lang.reflect.InaccessibleObjectException: Unable to make field
boolean java.nio.ByteBuffer.isReadOnly accessible: module java.base does not
"opens java.nio" to unnamed module @46d56d67
at
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
at
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
at
java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
at
org.apache.hadoop.ozone.common.ChecksumByteBufferImpl.<clinit>(ChecksumByteBufferImpl.java:51)</pre>
The code has a TODO comment later on:
<pre>
// TODO - when we eventually move to a minimum Java version >= 9 this
method
// should be refactored to simply call checksum.update(buffer), as
the
// Checksum interface has been enhanced to allow this since Java 9.
</pre>
Based on the todo the PR proposes to set the field accessible only if we are
running on Java 8, and use the Java 9 based solution for anything above Java9
until the update method is there.
## What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-11392
## How was this patch tested?
I tested with different vm versions (8, 9, 11, 17, 22) based on a simple
method that calls ChecksumByteBufferFactory.crc32Impl().
The original code fails with an error with 17 and 22, while gives a warning
about the setAccessible call with 9 and 11, while the patched version does not
give a warning, and works without any problem on all versions including Java 8.
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