V created ZOOKEEPER-3215:
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Summary: Handle Java 9/11 additions of covariant return types to
java.nio.ByteBuffer methods
Key: ZOOKEEPER-3215
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3215
Project: ZooKeeper
Issue Type: Bug
Affects Versions: 3.4.13
Reporter: V
Java 9 introduces covariant return types which allows one to have different
return types if return type in the overridden method is a sub type. Since Java
9, few functions return ByteBuffer, whereas the parent method return Buffer,
resulting in causing issues for Java 8 and below since for them the method does
not exist.
Steps To Reproduce:
1. Setup ZooKeeper Server with JDK11.
2. Setup ZooKeeper Client with JDK8.
3. Try connecting the client and server.
Results:
Cast ByteBuffer instances to Buffer before calling the method.
Notes:
There was a similar bug in the MongoDB community -
[https://jira.mongodb.org/browse/JAVA-2559]
This is not a contribution.
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