https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106292#M38061 <P>I noticed that maybe it's a good idea to leave HDFS in maintenance mode ... otherwise you will get loads of underreplicated blocks error messages since there is only one node.</P> Wed, 17 Aug 2016 20:43:20 GMT Former Member 2016-08-17T20:43:20Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106289#M38058 <P>Hi </P><P>I'm new to hadoop and also new to the sandbox of Hortonworks sandbox. I installed the sandbox and after a while of practicing, some components in the dashboard grayed out (as highlighted in the following pic) and are not able to execute anything on those grayed-out components. How can I bring those components back green status?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="6680-capture.png" style="width: 1256px;"><img src="https://community.cloudera.com/t5/image/serverpage/image-id/23521iD8AB304067B386CA/image-size/medium?v=v2&amp;px=400" role="button" title="6680-capture.png" alt="6680-capture.png" /></span></P> Mon, 19 Aug 2019 11:52:39 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106289#M38058 leon_peng_wan 2019-08-19T11:52:39Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106290#M38059 <P>You need to click on each component then in top right hand corner you need to select actions &gt; turn off maintenance mode. don't do it for secondary namenodes as that is there on purpose, this is a single node machine</P> Wed, 17 Aug 2016 05:16:32 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106290#M38059 aervits 2016-08-17T05:16:32Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106291#M38060 <P>Tez, Pig, Sqoop... are clients so they won't be "green" like HDFS or YARN</P> Wed, 17 Aug 2016 17:05:22 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106291#M38060 ledel 2016-08-17T17:05:22Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106292#M38061 <P>I noticed that maybe it's a good idea to leave HDFS in maintenance mode ... otherwise you will get loads of underreplicated blocks error messages since there is only one node.</P> Wed, 17 Aug 2016 20:43:20 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106292#M38061 Former Member 2016-08-17T20:43:20Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106293#M38062 <P>thanks. I was running a pig script. It was not responding anything for a very long time. Now I noticed that I need to wait for even longer for having the first log info.</P> Wed, 17 Aug 2016 21:07:55 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106293#M38062 leon_peng_wan 2016-08-17T21:07:55Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106294#M38063 <P>thanks very much for your help. But when I click HDFS components, under "actions" dropdown list, there is no turn off maintenance mode listed. </P> Wed, 17 Aug 2016 22:16:33 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106294#M38063 leon_peng_wan 2016-08-17T22:16:33Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106295#M38064 <P>For maintenance mode, you could always tun off the maintenance mode and enable the service manually. Some of the components are best left off when you don't really need them because some of them are really resource hogs. Generally, HDFS, MapReduce2, YARN and Hive should be green the makes most things working. </P> Thu, 25 Aug 2016 03:21:39 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Several-components-in-the-HDP-gray-out-how-can-i-make-it/m-p/106295#M38064 qiwang 2016-08-25T03:21:39Z