Configuring ZooKeeper Response Timeout Interval

Scenarios

The ZooKeeper client uses the FIFO queue to send a request to the server and waits for a response from the server. The client maintains the FIFO queue until it acknowledges the server's response to the request. The client waits indefinitely before acknowledging the response from the server. If the client cannot receive a response due to a server or network fault, the client enters the suspended state. Therefore, to avoid infinite waiting time, the client needs to associate with the ACK response timeout.

Figure 1 Request timeout logic
Click to enlarge

Configuration Description

Change the value of zookeeper.request.timeout based on the network latency. If the packet loss duration is greater than the default value 120000 ms, set this parameter to a larger value. To set zookeeper.request.timeout to X, set Dzookeeper.request.timeout to X when starting the ZooKeeper client.

**Table 1** Response timeout duration parameters
Parameter	System Parameter	Description	Default Value
zookeeper.request.timeout	zookeeper.request.timeout	If no response is received from the server within the configured time, terminate the request that is not responded with org.apache.zookeeper.KeeperException.ConnectionLossException and exit. Unit: millisecond	120000

Procedure

Log in to the node where the client is installed as the client installation user.
Run the following command to switch to the client installation directory:

cd /opt/client
Run the following command to edit the component_env file:

vi ZooKeeper/component_env

Change the value of zookeeper.request.timeout.
```
-Dzookeeper.request.timeout=120000
```
Run the :wq command to save execution.
Restart the client for the settings to take effect.