Hi! According to defaults in hdfs.site (Hadoop 2.5.1), blockreport interval is set to 6 hours. We observe a little more frequent reports in hadoop.log:
2015-05-27 03:49:42,580 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Sent 1 blockreports 1940728 blocks total. Took 25948 msec to generate and 2788 msecs for RPC and NN processing. Got back commands none 2015-05-27 04:22:28,762 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Sent 1 blockreports 1941057 blocks total. Took 2250 msec to generate and 9607 msecs for RPC and NN processing. Got back commands org.apache.hadoop.hdfs.server.protocol.FinalizeCommand@4ad5c971 2015-05-27 09:49:45,548 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Sent 1 blockreports 1944166 blocks total. Took 22699 msec to generate and 9342 msecs for RPC and NN processing. Got back commands none 2015-05-27 10:22:29,260 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Sent 1 blockreports 1944607 blocks total. Took 3230 msec to generate and 8027 msecs for RPC and NN processing. Got back commands org.apache.hadoop.hdfs.server.protocol.FinalizeCommand@7776078e 2015-05-27 15:49:52,063 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Sent 1 blockreports 1950516 blocks total. Took 23297 msec to generate and 16673 msecs for RPC and NN processing. Got back commands none 2015-05-27 16:22:38,911 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Sent 1 blockreports 1950871 blocks total. Took 5328 msec to generate and 14004 msecs for RPC and NN processing. Got back commands org.apache.hadoop.hdfs.server.protocol.FinalizeCommand@6bb6eec9 Does anyone know why second blockreport occurs 33 minutes after first one? -- Kind regards, Sergey Kazakov
