Created on 06-17-2019 11:12 PM - edited 09-16-2022 07:27 AM
Hello,
Where can we find (path) the property of ' ActiveStandbyElectorLock' or 'ActiveBreadcrumb' in zookeeper
(path for zookeeper for ' ActiveStandbyElectorLock' or 'ActiveBreadcrumb')
Created 06-17-2019 11:36 PM
Example:
1). Connect to your Zookeeper Quorum using "zkCli.sh" as following: Please pass your own Zookeeper quorum hostname in the below command.
# /usr/hdp/current/zookeeper-client/bin/zkCli.sh -server newhwx1.example.com,newhwx2.example.com,newhwx3.example.com:2181
2). List the contents of "ls /hadoop-ha"
[zk: newhwx1.example.com,newhwx2.example.com,newhwx3.example.com:2181(CONNECTED) 2] ls /hadoop-ha [My-NN-HA]
3). If you have configured NameNode HA then in the above command output you should see the NameService name for your Hadoop HA like in my case it is "My-NN-HA". Then list "ls /hadoop-ha/My-NN-HA"
[zk: newhwx1.example.com,newhwx2.example.com,newhwx3.example.com:2181(CONNECTED) 3] ls /hadoop-ha/My-NN-HA [ActiveBreadCrumb, ActiveStandbyElectorLock]
4). They you can get those ZNodes.
[zk: newhwx1.example.com,newhwx2.example.com,newhwx3.example.com:2181(CONNECTED) 4] get /hadoop-ha/My-NN-HA/ActiveBreadCrumb My-NN-HAnn1newhwx1.example.com �>(�> cZxid = 0x2000000a2 ctime = Tue May 22 02:20:06 UTC 2018 mZxid = 0x9000aee8c mtime = Mon Jun 17 03:24:47 UTC 2019 pZxid = 0x200000eee cversion = 0 dataVersion = 155 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 42 numChildren = 0
and
[zk: newhwx1.example.com,newhwx2.example.com,newhwx3.example.com:2181(CONNECTED) 5] get /hadoop-ha/My-NN-HA/ActiveStandbyElectorLock My-NN-HAnn1newhwx1.example.com �>(�> cZxid = 0x900081b6e ctime = Fri Jun 07 13:29:03 UTC 2019 mZxid = 0x900081b6e mtime = Fri Jun 07 13:29:03 UTC 2019 pZxid = 0x900081bee cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x26ab8da9f7fd456 dataLength = 42 numChildren = 0
.
.
Created 06-26-2019 02:01 PM
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Created 06-18-2019 04:33 AM
The above quesgtion and the replies below were originally posted in the Hadoop Core. On Tue Jun 18 04:32 UTC 2019, a member of the HCC moderation staff moved it to the Hadoop Core track. The Community Help Track is intended for questions about using the HCC site itself.