we have ambari cluster machines , HDP - 2.6.X we want to know the opinion of hortonworks about the avahi service dose this service should be disable or enable on ambari cluster machines ( master / workers / kafka ) ? note - we want to disable this service especially on the data-node machines ( workers ) , because we think that this service could be the reason of OS restart , for now this service is enable and running on all our machines in the ambari cluster reference - https://www.systutorials.com/docs/linux/man/8-avahi-daemon/ service avahi-daemon status Redirecting to /bin/systemctl status avahi-daemon.service ● avahi-daemon.service - Avahi mDNS/DNS-SD Stack Loaded: loaded (/usr/lib/systemd/system/avahi-daemon.service; enabled; vendor preset: enabled) Active: active (running) since Wed 2018-04-25 18:52:11 UTC; 17min ago ... View more

hi all, we have ambari cluster ( HDP version 2.6.0.1 ) one of the datanode machine - ( worker12 machine) , have a disk - /dev/sdf with File-system errors we notice about that from - e2fsck -n /dev/sdf 1. according to the output from the e2fsck , is it safty to run e2fsck -y /dev/sdf in order to repair a disk /dev/sdf file-system ? 2. is it necessary to do some other steps after running - e2fsck -y /dev/sdf ? ls /grid/sdf/hadoop/ hdfs/ yarn/ e2fsck -n /dev/sdf e2fsck 1.42.9 (28-Dec-2013) Warning! /dev/sdf is in use. Warning: skipping journal recovery because doing a read-only filesystem check. /dev/sdf contains a file system with errors, check forced. Pass 1: Checking inodes, blocks, and sizes Inodes that were part of a corrupted orphan linked list found. Fix? no Inode 176619732 was part of the orphaned inode list. IGNORED. Inode 176619733 was part of the orphaned inode list. IGNORED. Inode 176619745 was part of the orphaned inode list. IGNORED. Inode 176619747 was part of the orphaned inode list. IGNORED. Inode 176619751 was part of the orphaned inode list. IGNORED. Inode 176619752 was part of the orphaned inode list. IGNORED. Inode 176619753 was part of the orphaned inode list. IGNORED. Inode 176619756 was part of the orphaned inode list. IGNORED. Inode 176619759 was part of the orphaned inode list. IGNORED. Inode 176619760 was part of the orphaned inode list. IGNORED. Inode 176619762 was part of the orphaned inode list. IGNORED. Inode 176619763 was part of the orphaned inode list. IGNORED. Inode 176619766 was part of the orphaned inode list. IGNORED. Inode 176619767 was part of the orphaned inode list. IGNORED. Inode 176619773 was part of the orphaned inode list. IGNORED. Inode 176619774 was part of the orphaned inode list. IGNORED. Inode 176619775 was part of the orphaned inode list. IGNORED. Deleted inode 176619779 has zero dtime. Fix? no Inode 176619781 was part of the orphaned inode list. IGNORED. Inode 176619786 was part of the orphaned inode list. IGNORED. Inode 176619788 was part of the orphaned inode list. IGNORED. Inode 176619799 was part of the orphaned inode list. IGNORED. Inode 176619800 was part of the orphaned inode list. IGNORED. Pass 2: Checking directory structure Entry '00' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-8248ef4a-78f5-4f43-967d-0007096d0c0b (176554376) has deleted/unused inode 176619732. Clear? no Entry '16' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-8248ef4a-78f5-4f43-967d-0007096d0c0b (176554376) has deleted/unused inode 176619733. Clear? no Entry '17' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-8248ef4a-78f5-4f43-967d-0007096d0c0b (176554376) has deleted/unused inode 176619745. Clear? no Entry '21' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-8248ef4a-78f5-4f43-967d-0007096d0c0b (176554376) has deleted/unused inode 176619747. Clear? no Entry '2e' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-8248ef4a-78f5-4f43-967d-0007096d0c0b (176554376) has deleted/unused inode 176619762. Clear? no Entry '1f' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-8248ef4a-78f5-4f43-967d-0007096d0c0b (176554376) has deleted/unused inode 176619763. Clear? no Entry '19' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-8248ef4a-78f5-4f43-967d-0007096d0c0b (176554376) has deleted/unused inode 176619775. Clear? no Entry '35' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-8248ef4a-78f5-4f43-967d-0007096d0c0b (176554376) has deleted/unused inode 176619779. Clear? no Entry '09' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-8248ef4a-78f5-4f43-967d-0007096d0c0b (176554376) has deleted/unused inode 176619788. Clear? no Entry '34' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-c7b71625-3667-48e4-8843-8ddf3c6cc98c (176554456) has deleted/unused inode 176619752. Clear? no Entry '04' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-c7b71625-3667-48e4-8843-8ddf3c6cc98c (176554456) has deleted/unused inode 176619756. Clear? no Entry '0f' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-c7b71625-3667-48e4-8843-8ddf3c6cc98c (176554456) has deleted/unused inode 176619799. Clear? no Entry '3b' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619751. Clear? no Entry '3c' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619753. Clear? no Entry '1f' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619759. Clear? no Entry '15' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619760. Clear? no Entry '14' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619766. Clear? no Entry '01' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619767. Clear? no Entry '27' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619773. Clear? no Entry '35' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619774. Clear? no Entry '0c' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619781. Clear? no Entry '09' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619786. Clear? no Entry '31' in /hadoop/yarn/local/usercache/hive/appcache/application_1523380874382_1834/blockmgr-5a61cab7-acb9-497a-9d7b-e6d6b29235ed (176554463) has deleted/unused inode 176619800. Clear? no Pass 3: Checking directory connectivity Pass 4: Checking reference counts Inode 176554376 ref count is 63, should be 54. Fix? no Inode 176554456 ref count is 63, should be 60. Fix? no Inode 176554463 ref count is 64, should be 53. Fix? no Pass 5: Checking group summary information Block bitmap differences: -(1412960478--1412960479) -1412960491 -1412960493 -(1412960497--1412960499) -1412960502 -(1412960505--1412960506) -(1412960508--1412960509) -(1412960512--1412960513) -(1412960519--1412960521) -1412960525 -1412960527 -1412960532 -1412960534 -(1412960545--1412960546) Fix? no Free blocks count wrong (1918728678, counted=1919005864). Fix? no Inode bitmap differences: -(176619732--176619733) -176619745 -176619747 -(176619751--176619753) -176619756 -(176619759--176619760) -(176619762--176619763) -(176619766--176619767) -(176619773--176619775) -176619779 -176619781 -176619786 -176619788 -(176619799--176619800) Fix? no Directories count wrong for group #43120 (245, counted=222). Fix? no Free inodes count wrong (243908566, counted=243908282). Fix? no /dev/sdf: ********** WARNING: Filesystem still has errors ********** /dev/sdf: 282666/244191232 files (0.3% non-contiguous), 34777968/1953506646 blocks ... View more