https://community.cloudera.com/t5/Support-Questions/NodeManager-doesn-t-work-properly-though-it-seems-OK-on/m-p/316013#M226678 <P>Hi,</P><P>&nbsp;</P><P>I'm running a 6-node Hadoop Cluster, which version is HDP 3.1.4, and faced a weird situation so could anyone please help me out.&nbsp;</P><P>&nbsp;</P><P>Checking on Ambari WebUI, NodeManagers which is consisted of 3 nodes seem just fine. However when we push a application into yarn, all the app failed.</P><P>&nbsp;</P><P>Investigating the situation and log files, I found one of the NodeManager node's WebUI not responding and emitting the following log.&nbsp;</P><P>&nbsp;</P><P>WARN org.apache.hadoop.util.SysInfoLinux: Couldn't read /proc/meminfo: can't determine memory settings</P><P>&nbsp;</P><P>By restarting the NodeManager Service, this situation is resolved for a moment but seems reproducible.</P><P>&nbsp;</P><P>Does anyone faced same problem? Any comment is highly appreciated.</P><P>&nbsp;</P><P>Thank you in advance.</P><P>&nbsp;</P><P>Best Regards,</P><P>Yosuke</P> Sat, 08 May 2021 07:19:36 GMT yosuke 2021-05-08T07:19:36Z