Hi all, We deployed a data-intesive topology which involves in a lot of HDFS access via HDFS client. We found that after the topology has been executed for about half an hour, the topology throughput occasionally drops to zero for tens of seconds and sometimes the worker is shutdown without any error messages.
I checked the log thoroughly, found nothing wrong but a info message that reads “ClientCnxn [INFO] Client session timed out, have not head from server in 13333ms for sessioned …”. I am not sure how this message is related to the wired behavior of my topology. But every time my topology behaves abnormally, this message happens to show up in the log. Any help or suggestion is highly appreciated. Thanks, Li Wang.
