# Zookeeper failing to start **URL:** \ **Category:** Uncategorized\ **Created:** [December 12, 2020, 9:24am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727 "2020-12-12T09:24:46Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![shibily](https://avatars.discourse-cdn.com/v4/letter/s/d9b06d/32.png) [@shibily](https://community.dremio.com/u/shibily)\ **Post date:** [December 12, 2020, 9:24am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/1 "2020-12-12T09:24:46Z")
Hello community, I am trying to deploy dremio using helm in EKS Cluster but the zookeeper fails to start most of the time. Below are my configs. Zookeeper replicas = 3 Zookeeper logs: zk-0.log: 2020-12-12 09:20:32,948 [myid:] - WARN [main:QuorumPeer$QuorumServer@173] - Failed to resolve address: zk-2.zk-hs.dremio.svc.cluster.local java.net.UnknownHostException: zk-2.zk-hs.dremio.svc.cluster.local: Temporary failure in name resolution at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method) at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) at java.net.InetAddress.getAllByName0(InetAddress.java:1276) at java.net.InetAddress.getAllByName(InetAddress.java:1192) at java.net.InetAddress.getAllByName(InetAddress.java:1126) at java.net.InetAddress.getByName(InetAddress.java:1076) at org.apache.zookeeper.server.quorum.QuorumPeer$QuorumServer.recreateSocketAddresses(QuorumPeer.java:166) at org.apache.zookeeper.server.quorum.QuorumPeer$QuorumServer.(QuorumPeer.java:151) at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parseProperties(QuorumPeerConfig.java:238) at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:150) at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:101) at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78) zk-1.log: 2020-12-12 09:21:04,659 [myid:2] - WARN [WorkerSender[myid=2]:QuorumPeer$QuorumServer@173] - Failed to resolve address: zk-2.zk-hs.dremio.svc.cluster.local java.net.UnknownHostException: zk-2.zk-hs.dremio.svc.cluster.local: Temporary failure in name resolution at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method) at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) at java.net.InetAddress.getAllByName0(InetAddress.java:1276) at java.net.InetAddress.getAllByName(InetAddress.java:1192) at java.net.InetAddress.getAllByName(InetAddress.java:1126) at java.net.InetAddress.getByName(InetAddress.java:1076) at org.apache.zookeeper.server.quorum.QuorumPeer$QuorumServer.recreateSocketAddresses(QuorumPeer.java:166) at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:595) at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:538) at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:452) at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:433) at java.lang.Thread.run(Thread.java:748) zk-2.log: 2020-12-12 09:22:12,837 [myid:3] - WARN [WorkerSender[myid=3]:QuorumPeer$QuorumServer@173] - Failed to resolve address: zk-1.zk-hs.dremio.svc.cluster.local java.net.UnknownHostException: zk-1.zk-hs.dremio.svc.cluster.local: Temporary failure in name resolution at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method) at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) at java.net.InetAddress.getAllByName0(InetAddress.java:1276) at java.net.InetAddress.getAllByName(InetAddress.java:1192) at java.net.InetAddress.getAllByName(InetAddress.java:1126) at java.net.InetAddress.getByName(InetAddress.java:1076) at org.apache.zookeeper.server.quorum.QuorumPeer$QuorumServer.recreateSocketAddresses(QuorumPeer.java:166) at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:595) at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:538) at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:452) at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:433) at java.lang.Thread.run(Thread.java:748) And the Interesting part is sometimes zookeeper starts without any issues. ---
**Author:** ![balaji.ramaswamy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/balaji.ramaswamy/32/843_2.png) [@balaji.ramaswamy](https://community.dremio.com/u/balaji.ramaswamy)\ **Post date:** [December 13, 2020, 8:50am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/2 "2020-12-13T08:50:48Z")
Hi @shibily I see you are running into a name resolution issue. See below error. are we sure this is not a DNS issue and if the IP and hostname of the ZK host are resolvable from the Dremio coordinator Try using IP address of the Zoo keeper hosts in dremio.conf > 2020-12-12 09:20:32,948 [myid:] - WARN [main:QuorumPeer$QuorumServer@173] - Failed to resolve address: zk-2.zk-hs.dremio.svc.cluster.local ---
**Author:** ![shibily](https://avatars.discourse-cdn.com/v4/letter/s/d9b06d/32.png) [@shibily](https://community.dremio.com/u/shibily)\ **Post date:** [December 13, 2020, 10:29am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/3 "2020-12-13T10:29:00Z")
Hi buddy, I am trying to deploy this using official Dremio helm charts(which I believe is stable) and don’t really want to get into those configs as I am a beginner here. Confirming again, is the helm chart stable? ---
**Author:** ![balaji.ramaswamy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/balaji.ramaswamy/32/843_2.png) [@balaji.ramaswamy](https://community.dremio.com/u/balaji.ramaswamy)\ **Post date:** [December 14, 2020, 4:49am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/4 "2020-12-14T04:49:58Z")
@shibily Helm charts are stable. The reason it is failing is Dremio is unable to resolve “zk-2.zk-hs.dremio.svc.cluster.local” Are you able to ping “zk-2.zk-hs.dremio.svc.cluster.local” from the Dremio coordinator pod? ---
**Author:** ![shibily](https://avatars.discourse-cdn.com/v4/letter/s/d9b06d/32.png) [@shibily](https://community.dremio.com/u/shibily)\ **Post date:** [December 14, 2020, 6:12am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/5 "2020-12-14T06:12:22Z")
@balaji.ramaswamy No pinging to “zk-2.zk-hs.dremio.svc.cluster.local” fails. It’s strange that zookeeper starts without any problems 6/10 times I provision them. And coordinator replicas are set to 0 by default in the helm chart. Pointing the helm chart URL below. > **[dremio/dremio-cloud-tools](https://github.com/dremio/dremio-cloud-tools/tree/master/charts/dremio_v2)** > > master/charts/dremio\_v2 ---
**Author:** ![balaji.ramaswamy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/balaji.ramaswamy/32/843_2.png) [@balaji.ramaswamy](https://community.dremio.com/u/balaji.ramaswamy)\ **Post date:** [December 15, 2020, 6:54am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/6 "2020-12-15T06:54:50Z")
@shibily Dremio is unable to resolve the ZK hostname, is there an associated IP you are able to ping? Maybe try that instead of the hostname? ---
**Author:** ![shibilys](https://avatars.discourse-cdn.com/v4/letter/s/5fc32e/32.png) [@shibilys](https://community.dremio.com/u/shibilys)\ **Post date:** [May 24, 2021, 12:25pm UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/7 "2021-05-24T12:25:09Z")
@balaji.ramaswamy no, still the same issue. PS: This is my new account as I had changed my organization. ---
**Author:** ![balaji.ramaswamy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/balaji.ramaswamy/32/843_2.png) [@balaji.ramaswamy](https://community.dremio.com/u/balaji.ramaswamy)\ **Post date:** [May 25, 2021, 7:02am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/8 "2021-05-25T07:02:10Z")
@shibilys Can you please do nslookup on zk-2.zk-hs.dremio.svc.cluster.local, zk-0.zk-hs.dremio.svc.cluster.local and zk-1.zk-hs.dremio.svc.cluster.local and see if it returns the same result, wondering why you are getting ``` 2020-12-12 09:20:32,948 [myid:] - WARN [main:QuorumPeer$QuorumServer@173] - Failed to resolve address: zk-2.zk-hs.dremio.svc.cluster.local java.net.UnknownHostException: zk-2.zk-hs.dremio.svc.cluster.local: Temporary failure in name resolution ``` ---
**Author:** ![shibilys](https://avatars.discourse-cdn.com/v4/letter/s/5fc32e/32.png) [@shibilys](https://community.dremio.com/u/shibilys)\ **Post date:** [May 25, 2021, 7:37am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/9 "2021-05-25T07:37:54Z")
@balaji.ramaswamy It is returning the same result. Can you try to reproduce by deploying the helm chart? [dremio-cloud-tools/charts/dremio\_v2 at master · dremio/dremio-cloud-tools · GitHub](https://github.com/dremio/dremio-cloud-tools/tree/master/charts/dremio_v2) ---
**Author:** ![balaji.ramaswamy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/balaji.ramaswamy/32/843_2.png) [@balaji.ramaswamy](https://community.dremio.com/u/balaji.ramaswamy)\ **Post date:** [May 26, 2021, 5:53am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/10 "2021-05-26T05:53:38Z")
@shibilys We have many customers using our helm charts, lets do this. Can we start with your helm charts? Are you able to provide us with yours? ---
**Author:** ![shibilys](https://avatars.discourse-cdn.com/v4/letter/s/5fc32e/32.png) [@shibilys](https://community.dremio.com/u/shibilys)\ **Post date:** [May 30, 2021, 9:11am UTC](https://community.dremio.com/t/zookeeper-failing-to-start/6727/11 "2021-05-30T09:11:58Z")
@balaji.ramaswamy thank you for your support. I figured out that pods in my worker nodes has no access outside it because of some AWS Security group rule. Everything is working as normal. Thanks again \<3