hi community cloudera,  we are verifying a strange behavior of an Impala connection controller on nifi, when the processor starts the connection, it displays the error below: [Cloudera][ImpalaJDBCDriver](500593) Communication link failure. Failed to connect to server. Reason: java.net.SocketException: Connection or outbound has closed communication between hosts is ok, ports communicating without problem. when we start and stop the processor the connection occurs without problem, this shows that the error is intermittent. has anyone experienced this type of problem? ... View more

hello cloudera community,   do I need to insert a new datanode in the hdfs and with that I need to know how much size will be used from this new datanode after performing a rebalance on the hdfs?   for example, I have the following scenario:   datanode 1 has 36tb total to use, 30tb is being used, containing about 2.5 million blocks datanode 2 has 36tb total to use, 30tb is being used, containing about 2.5 million blocks datanode 3 has 36tb total to use, 30tb is being used, containing about 2.5 million blocks datanode 4 has 36tb total to use, 30tb is being used, containing about 2.5 million blocks datanode 5 has 36tb total to use, 30tb is being used, containing about 2.5 million blocks datanode 6 has 36tb total to use, 30tb is being used, containing about 2.5 million blocks   i will insert the "datanode 7" which has 36tb total, after performing the rebalance in hdfs, how much will this new datanode 7 receive data? ... View more

hello cloudera community, today the cluster already has thousands of blocks in hdfs, more than 23 million blocks.   after configuring the rack in the cluster, the hdfs will recognize the racks and will start moving the blocks to the racks to increase the availability of the blocks or will i have to rebalance the hdfs? ... View more