Disable default error and sucess message in liferay portlet.

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Follow the below step to disable default error and success message in liferay portlet:

Step 1: Add the below code in portlet.xml

<init-param>
            <name>add-process-action-success-action</name>
            <value>false</value>
</init-param>
Before
<expiration-cache>0</expiration-cache>

Step 2: Add the below code in portlet action method

PortletConfig portletConfig = (PortletConfig)actionRequest.getAttribute(JavaConstants.JAVAX_PORTLET_CONFIG);
            LiferayPortletConfig liferayPortletConfig = (LiferayPortletConfig) portletConfig;
            SessionMessages.add(actionRequest, liferayPortletConfig.getPortletId() + SessionMessages.KEY_SUFFIX_HIDE_DEFAULT_ERROR_MESSAGE);
            SessionMessages.add(actionRequest, liferayPortletConfig.getPortletId() + SessionMessages.KEY_SUFFIX_HIDE_DEFAULT_SUCCESS_MESSAGE);

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