zentol commented on a change in pull request #11313: [FLINK-16373] Make
JobManagerLeaderListener thread safe
URL: https://github.com/apache/flink/pull/11313#discussion_r387810300
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/taskexecutor/JobLeaderService.java
##########
@@ -251,90 +254,83 @@ private JobManagerLeaderListener(JobID jobId) {
}
public void stop() {
- stopped = true;
+ synchronized (lock) {
+ stopped = true;
- if (rpcConnection != null) {
- rpcConnection.close();
+ if (rpcConnection != null) {
+ rpcConnection.close();
+ }
}
}
public void reconnect() {
- if (stopped) {
- LOG.debug("Cannot reconnect because the
JobManagerLeaderListener has already been stopped.");
- } else {
- final RegisteredRpcConnection<JobMasterId,
JobMasterGateway, JMTMRegistrationSuccess> currentRpcConnection = rpcConnection;
-
- if (currentRpcConnection != null) {
- if (currentRpcConnection.isConnected())
{
-
- if
(currentRpcConnection.tryReconnect()) {
- // double check for
concurrent stop operation
- if (stopped) {
-
currentRpcConnection.close();
- }
- } else {
- LOG.debug("Could not
reconnect to the JobMaster {}.", currentRpcConnection.getTargetAddress());
- }
+ synchronized (lock) {
+ if (stopped) {
+ LOG.debug("Cannot reconnect because the
JobManagerLeaderListener has already been stopped.");
+ } else {
+ if (rpcConnection != null) {
+ Preconditions.checkState(
+
rpcConnection.tryReconnect(),
Review comment:
Can we add a javadoc to `RegisteredRpcConnection#tryReconnect` stating that
it only returns false in the case of a concurrent modification?
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