How to Fix Java.Net.SocketTimeoutException: Read Timed Out Under Tomcat

1. java.net.SocketTimeoutException: Read timed out
2. Causes of java.net.SocketTimeoutException: Read timed out
3. Solution to java.net.SocketTimeoutException: Read timed out

Today’s tutorial will discuss potential reasons and solutions for the java.net.SocketTimeoutException: Read timed out under Tomcat in Java.

java.net.SocketTimeoutException: Read timed out

java.net.SocketTimeoutException: Read timed out occurs when the server attempts to read data from the request; however, it is taking far longer than the allowed amount of time for the data to arrive from the client. The timeout option can have a developer’s default value pre-set for client and server activities.

Causes of java.net.SocketTimeoutException: Read timed out

The following are some potential causes that could result in java.net.SocketTimeoutException: Read timed out:

1. The server is trying to read data from the request; however, it is taking significantly more than the specified amount of time for the data to arrive from the client. Timeout in this context is often represented by the tomcat connector -> connectionTimeout attribute.
2. When there is a lot of concurrent activity, this error can occur if the keepalive feature is turned on.
3. It occurs if no data arrives before the timeout expires.
4. When the server has slow performance.

Solution to java.net.SocketTimeoutException: Read timed out

1. The modification of the .xml context file and the CONNECTOR definition, which controls the connectivity of the workstation browser to the Tomcat server, is one approach that might be taken to resolve this issue inside the context of the Tomcat web application.

2. To be more concise, adjust the value of the connectionTimeout property. Raising this value will prevent the error condition from occurring.

3. For example, we have the following .xml file containing the below data:

   <Connector executor="tomcat"
   	port="8080" protocol="HTTP/1.1"
   	connectionTimeout="30000"
   	redirectPort="8443" />
   

4. To disable the upload timeout and cancel the read-write connection timeout setting, we can add disableUploadTimeout= "false".

   <Connector executor="tomcat"
   	port="8080" protocol="HTTP/1.1"
   	connectionTimeout="30000" disableUploadTimeout="false"
   	redirectPort="8443" />
   

5. We can also increase the connection lifespan by including the keepAliveTimeout= "200000" parameter.

   <Connector executor="tomcat"
   	port="8080" protocol="HTTP/1.1"
   	connectionTimeout="30000"
   	keepAliveTimeout= "200000"
   	redirectPort="8443" />