Hello everyone,   I have few question on regarding the java upgrade in datanodes.    Current about my cluster Information: (Total 7 nodes cluster)   Version : Cloudera Enterprise 5.9.1 ( CDH 5.9.1, Parcels ) Java VM Name: Java HotSpot(TM) 64-Bit Server VM Java VM Vendor: Oracle Corporation Java Version: 1.7.0_67   i have upgraded only Namenodes, (NN01, NN02) $ java -version java version "1.8.0_171" Java(TM) SE Runtime Environment (build 1.8.0_171-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)   Questions:   1) I have upgrade Java only for namenodes, after the upgrade i'm getting the concering health of NodeManager? Like DNS Resolution, Web server status, RPC Latency Error:   RPC Latency: The moving average of the RPC latency was 10.8 second(s) ms over the previous 5 minute(s). The moving average of the queue time was 0 second(s) ms. The moving average of the processing time was 10.8 second(s) ms. Critical threshold: 5 second(s).   DNS Resolution: The hostname and canonical name for this host are consistent when checked from a Java process. The most recent DNS resolution took 13.2 second(s). Warning threshold: 1 second(s).   Web Server Status: The web server of this role was responding with metrics. The most recent collection took 15.6 second(s). Warning threshold: 10 second(s).   Please Help me with this issue?   Thanks & Regards, krishna. ... View more

Hello There,     I'm getting the error while login into the namenodeUI, ResourcemanagerUI, JobhistoryserverUI. I have checked the httpd service it is up and running. I have checked the port it is listening. Please tell me the solution for this. need to check the NamenodeUI.   Error:   HTTP ERROR 401 Problem accessing /index.html. Reason: org.apache.hadoop.security.authentication.util.SignerException: Invalid signed text: Powered by Jetty://   Thanks & regards, krishna. ... View more

Hello Support, There was an error in file descriptor and block count. it is occuring in almost all datanodes, some datanodes were bad and critical. Below are the errors we are facing.   1) Concerning : The DataNode has 1,142,375 blocks. Warning threshold: 500,000 block(s). ( on what bases the Block count is counted we have 10 DN each 50TB).   2)Concerning : Bad  :   Open file descriptors: 23,576. File descriptor limit: 32,768. Percentage in use: 71.95%. Critical threshold: 70.00%.  (Is it okay if we increase the threshold value for warining: 75% and critical for 85%).   The Ulimit -n 32768.  Please suggest me the solution and let me know if you need more information.   Thanks & Regards, Krishna ... View more

Hello there,   Please help me in solving the  Reports Manager Working Directory Free Space.   So, the “Java Heap Size of Reports Manager in Bytes” is 12GB.  At the point of concerning: /dev/mapper/optvg-fs_var_lib_cloudera_scm_headlamp                          20G       11G     8.6G     56% /var/lib/cloudera-scm-headlamp   Heap Dump Directory Free Space Monitoring Absolute Thresholds -- at warning at 10 GiB. and critical at 5 GiB.     When the health is Good.                            20G     5.0G       15G     26% /var/lib/cloudera-scm-headlamp I have restarted the reports manager still the health of report manager is concerning.    Thanks for you time. regards, krishnap ... View more

Hello there,   Please help me in solving the  Reports Manager Working Directory Free Space.   So, the “Java Heap Size of Reports Manager in Bytes” is 12GB.  At the point of concerning: /dev/mapper/optvg-fs_var_lib_cloudera_scm_headlamp                        20G   11G   8.6G   56% /var/lib/cloudera-scm-headlamp   Heap Dump Directory Free Space Monitoring Absolute Thresholds -- at warning at 10 GiB. and critical at 5 GiB.     When the health is Good.                          20G   5.0G   15G   26% /var/lib/cloudera-scm-headlamp I have restarted the reports manager still the health of report manager is concerning.    Thanks for you time. regards, krishnap   ... View more

Hello Support, There was an error in file descriptor and block count. 1) Concerning : The DataNode has 1,142,375 blocks. Warning threshold: 500,000 block(s). 2)Concerning : Open file descriptors: 17,793. File descriptor limit: 32,768. Percentage in use: 54.30%. Warning threshold: 50.00% where as the abinitio they uses the size. of PROD Hadoop:--- AB_DLB_MAX_FILE_BYTES 33554432 AI_SORT_MAX_CORE 104857600 Please suggest me the solution. Thanks & Regards, Bhushan ... View more