[HDDS-3902] OM HA client failover switcher to a wrong OM server

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Cannot Reproduce
• Component/s: OM HA
• Labels: 0.7.0
• Assignee: Szabolcs Gál
• Reporter: Marton Elek
• Created: 30/Jun/20 14:19
• Updated: 31/Aug/23 11:23
• Resolved: 31/Aug/23 11:23

Description

Found this problem with the PR/branch HDDS-3878, but it seems to be independent.

1. ozone sh volume create /vol1 works well with HA
2. ozone freon omkg (rpc client) doesn't work

ozone freon omkg | grep "Failing over"
2020-06-30 14:15:31 DEBUG OMFailoverProxyProvider:271 - Failing over OM proxy to index: 1, nodeId: om2
2020-06-30 14:15:31 DEBUG OMFailoverProxyProvider:271 - Failing over OM proxy to index: 2, nodeId: om3
2020-06-30 14:15:34 DEBUG OMFailoverProxyProvider:271 - Failing over OM proxy to index: 0, nodeId: omNodeIdDummy

om2 seems to be the leader but for some reason the failover logic switching back to an unknown node

2020-06-30 14:16:35 DEBUG OMFailoverProxyProvider:271 - Failing over OM proxy to index: 2, nodeId: om3
2020-06-30 14:16:35 DEBUG Client:63 - getting client out of cache: org.apache.hadoop.ipc.Client@f5acb9d
2020-06-30 14:16:35 DEBUG Client:497 - The ping interval is 60000 ms.
2020-06-30 14:16:35 DEBUG Client:795 - Connecting to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862
2020-06-30 14:16:35 DEBUG Client:1074 - IPC Client (363509958) connection to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862 from root: starting, having connections 3
2020-06-30 14:16:35 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862 from root sending #0 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862 from root got value #0
2020-06-30 14:16:36 DEBUG ProtobufRpcEngine:254 - Call: submitRequest took 439ms
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862 from root sending #1 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862 from root got value #1
2020-06-30 14:16:36 DEBUG ProtobufRpcEngine:254 - Call: submitRequest took 2ms
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862 from root sending #2 org.apache.hadoop.ozone.om.pro
tocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862 from root got value #2
2020-06-30 14:16:36 DEBUG ProtobufRpcEngine:254 - Call: submitRequest took 1ms
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862 from root sending #3 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-2.ozone-om.default.svc.cluster.local/10.42.0.175:9862 from root got value #3
2020-06-30 14:16:36 DEBUG ProtobufRpcEngine:254 - Call: submitRequest took 1ms
2020-06-30 14:16:36 DEBUG Client:63 - getting client out of cache: org.apache.hadoop.ipc.Client@f5acb9d
2020-06-30 14:16:36 DEBUG Groups:312 - GroupCacheLoader - load.
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #5 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #11 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #8 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #12 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #10 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #6 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #9 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #7 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #4 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1137 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root sending #13 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root got value #5
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root got value #8
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root got value #11
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root got value #10
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root got value #12
2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root got value #7
2020-06-30 14:16:36 DEBUG Hadoop3OmTransport:140 - RetryProxy: OM:om1 is not the leader. Suggested leader is OM:om3.
        at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.createNotLeaderException(OzoneManagerProtocolServerSideTranslatorPB.java:198)
        at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.processRequest(OzoneManagerProtocolServerSideTranslatorPB.java:141)
        at org.apache.hadoop.hdds.server.OzoneProtocolMessageDispatcher.processRequest(OzoneProtocolMessageDispatcher.java:74)
        at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitRequest(OzoneManagerProtocolServerSideTranslatorPB.java:113)
        at org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos$OzoneManagerService$2.callBlockingMethod(OzoneManagerProtocolProtos.java)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:528)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1070)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:999)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:927)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2915)

2020-06-30 14:16:36 DEBUG Client:1191 - IPC Client (363509958) connection to ozone-om-0.ozone-om.default.svc.cluster.local/10.42.0.173:9862 from root got value #9
2020-06-30 14:16:36 DEBUG OMFailoverProxyProvider:299 - Incrementing OM proxy index to 0, nodeId: omNodeIdDummy

As you can see (after a few failover) finally om2 has been found and a few requests has been handled. But after that the client switched back to the om0 (???)