https://community.cloudera.com/t5/Support-Questions/hdfs-client-takes-20s-to-failover-to-alternate-namenode/m-p/208697#M170654 <P>Yes, actually it's 20s. I believe that it is the default from the ipc.client.connect.timeout default. I am trying to see if I can set it to 2s. The main problem seems to be that for every FileSystem object I create it wants to always try my server 1 first which is down. It doesn't seem to remember that it was down the last time it tried and continues to keep retrying it for each new FileSystem object. I am also trying caching my own FileSystem object so that, if I reuse an object that has already failed over to the second server, I won't incur the same 2s delay in first trying to connect to the failed server.</P> Mon, 09 Oct 2017 23:11:31 GMT kc7bfi 2017-10-09T23:11:31Z