aloyszhang edited a comment on issue #7476:
URL: https://github.com/apache/pulsar/issues/7476#issuecomment-656712253
@sijie,
At the first time, I thoung it was caused by session expires, by no
SessionExpired related log can be found.
```java
localZkConnectionSvc.start(new ZookeeperSessionExpiredHandler() {
@Override
public void onSessionExpired() {
log.error("Shutting down ZK sessions: {}", -1);
}
@Override
public void setWatcher(ZooKeeperSessionWatcher watcher) {
}
});
this.localZkCache = new
LocalZooKeeperCache(localZkConnectionSvc.getLocalZooKeeper(),
(int)
TimeUnit.MILLISECONDS.toSeconds(zookeeperSessionTimeoutMs),
this.orderedExecutor);
localZkConnectionSvc.start(new ZookeeperSessionExpiredHandler() {
@Override
public void onSessionExpired() {
try {
localZkCache.getZooKeeper().close();
} catch (InterruptedException e) {
log.warn("Failed to shutdown ZooKeeper gracefully {}",
e.getMessage(), e);
}
}
```
This problem has happended several time in our pulsar cluster.
And , both `DiscoveryServiceServlet` and `BrokerDiscoveryProvider ` will be
started if run discovery service .
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