Missed javodoc

2016-12-22 Thread Vasiliy Sisko
Hello. I notice that javadoc for nested classes is missed in Hadoop documentation. For example org.apache.hadoop.yarn.client.api.async.AMRMClientAsync class contains nested CallbackHandler interface with missed javadoc. -- Vasiliy Sisko GridGain Systems www.gridgain.com

Re: Safe mode on after restarting hadoop

2016-12-22 Thread Mingliang Liu
Anu gave good analysis. Another simple case is that NN takes time to process the block reports before leaving the safe mode. You can monitor the safe mode report for progress. Check NN log for more information. L > On Dec 22, 2016, at 8:02 AM, Chathuri Wimalasena wrote:

Re: Safe mode on after restarting hadoop

2016-12-22 Thread Anu Engineer
Hi Chathuri, This means that NN has not heard about all the blocks it is supposed to hear from the datanodes. Since all the datanodes are functional, here are some things to check. 1. Is there any volume loss on data nodes? 2. You mentioned that you had a failure in Namenode, are you sure

Safe mode on after restarting hadoop

2016-12-22 Thread Chathuri Wimalasena
Hi, We have a hadoop cluster with 10 data nodes. We had a disk failure with the login node where the namenode, secondary namenode running and replaced the failed disk. Failed disk does not affect the data, it only affected the operating system. After replacing the failed disk, when I restart the