Jacky007 created ZOOKEEPER-1690:
-----------------------------------
Summary: Race condition when close session may cause a NPE in
sendBuffer
Key: ZOOKEEPER-1690
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1690
Project: ZooKeeper
Issue Type: Bug
Affects Versions: 3.4.6
Reporter: Jacky007
In NIOServerCnxn.java
public void close() {
closeSock();
...
sk.cancel();
Close sock first, then cancel the channel.
public void sendBuffer(ByteBuffer bb) {
if ((sk.interestOps() & SelectionKey.OP_WRITE) == 0) {
...
sock.write(bb);
Get ops of the channel, then read sock (may be null)
I have noticed that the 3.5.0-branch has fixed the problem.
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