This can be fixed by increasing the timeout value by following the below steps.
Note: Take a snapshot of the each Log Insight appliance in the cluster or backup of the config file before making the changes.
Steps:
<event-collection-timeout-millis value="1200000" />
Note: The above example is taken from a lab, so your values will differ
If this method does not work you will need to update the 'loginsight-config.xml#xxx' file on the Operations for Logs appliance.
cd /storage/core/loginsight/config
cp loginsight-config.xml#xxx loginsight-config.xml#xxx.old
vi loginsight-config.xml#xxx
<event-collection-timeout-millis value="1200000" />
service loginsight restart