java.io.NotSerializableException: org.mybatis.spring.SqlSessionTemplate

Question

I am getting below exception when I am doing clustering in Tomcat.

SEVERE: Unable to serialize delta request for sessionid [E67521E84EE07AB85E0243149B4DE472.jvm2] java.io.NotSerializableException: org.mybatis.spring.SqlSessionTemplate at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1180) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)

Luciano van der Veekens · Accepted Answer · 2017-06-06 20:27:22Z

1

The Javadoc of the exception explains the meaning of the exception:

Thrown when an instance is required to have a Serializable interface. The serialization runtime or the class of the instance can throw this exception. The argument should be the name of the class.

https://docs.oracle.com/javase/7/docs/api/java/io/NotSerializableException.html

Somehow your program tries to write an instance of SqlSessionTemplate to an object stream (aka serialization), perhaps to send it over a network to a different machine.

Normally to fix this exception, you let a class implement the Serializable interface, but since this is a library class and it's not owned by you, it cannot be changed and hence it's not meant to be serialized.

edited Jun 6, 2017 at 20:27

answered Jun 6, 2017 at 20:10

Luciano van der Veekens

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