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Help Center/ MapReduce Service/ Developer Guide (LTS)/ MapReduce Development Guide (Security Mode)/ More Information/ FAQ/ When an Application Is Run, An Abnormality Occurs Due to Network Faults

When an Application Is Run, An Abnormality Occurs Due to Network Faults

Updated on 2022-11-18 GMT+08:00

Question

When an application is run in the Windows environment, the application fails to connect the cluster. While the application running in the Linux environment (the same network with the host that is installed with the MRS Cluster) works properly.

Answer

Kerberos authentication requires the UDP protocol. But the firewall disables the required UDP ports with special operations, resulting in that the network of the application running in the Windows environment fails to connect with the MRS Cluster. Reset the firewall, and open the UDP ports that are required, to ensure that the host running the application in the Windows environment can connect with the MRS.

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