ZooKeeperNetEx connection loss issue: an acquired lock seems is not released

I’ve implemented a lock with the Zookeeper with this configuration :

1. DistributedLock.ZooKeeper - Version=“1.0.0”
2. dotnet version 6.0
3. Hosted on K8s (one pod, there is no concurrent request)
4. Zookeeper server configuration on K8s :

version: “3.9” services: zk1: container_name: zk1 hostname: zk1 image: bitnami/zookeeper:3.8.0-debian-11-r57 ports: - 2181:2181 environment: - ALLOW_ANONYMOUS_LOGIN=yes - ZOO_SERVER_ID=1 - ZOO_SERVERS=0.0.0.0:2888:3888 - ZOO_MAX_CLIENT_CNXNS=500

There are several worker services inside the application, each of them working with a different lock key. periodically it tries to accuqire the lock and do some processes. It seems they are working without problem, but after a while, I get this exception Locking failed.Exception of type 'org.apache.zookeeper.KeeperException+ConnectionLossException' was thrown. org.apache.zookeeper.KeeperException+ConnectionLossException: Exception of type 'org.apache.zookeeper.KeeperException+ConnectionLossException' was thrown.

It seems the lock cannot be acquired because it has not been released, although there is no concurrent request for the lock key.

The LockService code in dotnet :

    `
     private TimeSpan _connectionTimeoutInSecond = TimeSpan.FromSeconds(30);
     private TimeSpan _waitingForLockInSecond = TimeSpan.FromSeconds(30);
     public async Task<LockProcessResult> DoActionWithLockAsync(string lockKey, Func<Task> func)
       {
      var processResult = new LockProcessResult();
      try
      {
        var @lock = new ZooKeeperDistributedLock(lockKey, _configuration.ConnectionString, opt =>
        {
            opt.ConnectTimeout(_connectionTimeoutInSecond);
        });

        await using (var handle = await @lock.TryAcquireAsync(timeout: _waitingForLockInSecond))
        {
            if (handle != null)
            {
                // I have the lock 
                await func(); 
            }
            else
            {
                processResult.SetException(new LockAcquisitionFailedException(lockKey)); 
            }
        }

     }
     catch (Exception ex)
     {
        //I got the exceptions here
        processResult.SetException(ex); 
     }

     return processResult;
 }`

I appreciate any suggestion

[devlnull]

Unfortunately we are getting Connection Loss sometimes, but it will be gone in a minute.

Exception of type 'org.apache.zookeeper.KeeperException+ConnectionLossException' was thrown.

[Jetski5822]

@madelson we have just tested your change locally and in a K8 cluster and that code change fixed the issue - could you issue a PR for this change against the main repo?