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https://issues.apache.org/jira/browse/CASSANDRA-14752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16617225#comment-16617225
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Varun Barala commented on CASSANDRA-14752:
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[~blerer] Thanks for your reply. In one of our tool, we use below code to
generate the DecoratedKey from String and In the case of boolean type, we are
facing this issue.
{code:java}
DatabaseDescriptor.getPartitioner().decorateKey(getKeyValidator(row.getColumnFamily())
.fromString(stringKey));
{code}
[https://github.com/apache/cassandra/blob/cassandra-2.1.13/src/java/org/apache/cassandra/db/marshal/AbstractCompositeType.java#L255]
`byteBuffer.put` changes the position. Though it has a comment: *// it's ok to
consume component as we won't use it anymore.*
> serializers/BooleanSerializer.java is using static bytebuffers which may
> cause problem for subsequent operations
> ----------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-14752
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14752
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Varun Barala
> Priority: Major
> Attachments: patch, patch-modified
>
>
> [https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/serializers/BooleanSerializer.java#L26]
> It has two static Bytebuffer variables:-
> {code:java}
> private static final ByteBuffer TRUE = ByteBuffer.wrap(new byte[]{1});
> private static final ByteBuffer FALSE = ByteBuffer.wrap(new byte[]{0});{code}
> What will happen if the position of these Bytebuffers is being changed by
> some other operations? It'll affect other subsequent operations. IMO Using
> static is not a good idea here.
> A potential place where it can become problematic:
> [https://github.com/apache/cassandra/blob/cassandra-2.1.13/src/java/org/apache/cassandra/db/marshal/AbstractCompositeType.java#L243]
> Since we are calling *`.remaining()`* It may give wrong results _i.e 0_ if
> these Bytebuffers have been used previously.
> Solution:
>
> [https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/serializers/BooleanSerializer.java#L42]
> Every time we return new bytebuffer object. Please do let me know If there
> is a better way. I'd like to contribute. Thanks!!
> {code:java}
> public ByteBuffer serialize(Boolean value)
> {
> return (value == null) ? ByteBufferUtil.EMPTY_BYTE_BUFFER
> : value ? ByteBuffer.wrap(new byte[] {1}) : ByteBuffer.wrap(new byte[] {0});
> // false
> }
> {code}
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