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  1. Couchbase Server
  2. MB-62957

Cluster stuck in a repetitive rebalance while upgrade, Rebalance exited with reason {service_rebalance_failed,cbas The MetadataNode failed to bind before the configured timeout

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    Description

      Observed in RC-1 for 7.2.6

      Test Steps :

      1. Deployed a GCP cluster with the image = 
        couchbase-cloud-server-7-2-3-6705-v1-0-25
      2. Loads Buckets, 1 scope and 5 collections onto it
      1. Loads docs onto it so the CPU usage goes up
      1. Triggered a Scale Out to 5 Nodes
      1. After a successful ScaleOut, Triggered an upgrade to = 
        couchbase-cloud-server-7-2-6-8101-v1-0-34
      2. Post successful upgrade, triggers a Scale-In back to 3 nodes.
      1. Destroys the cluster.

      Observations : 

      • After the scale up step, the upgrade got triggered successfully
      • While upgrading, another node got added
      • But the cluster is stuck in a repetitive rebalancing state since then
      • 6 nodes in the cluster (5 after scale-out & 1 for upgrade rebalance), (Attached)
      • One node is in the version 7.2.3-6705 while other 5 have upgraded to 7.2.6-8101

      Logs attached below

      Server Rebalance Failure Log : 

      Rebalance exited with reason {service_rebalance_failed,cbas, {worker_died, {'EXIT',<0.7948.630>, {rebalance_failed,

      {service_error, <<"Rebalance e211f82a01482b692f206d47baaff1e9 failed: The MetadataNode failed to bind before the configured timeout (60 seconds); the MetadataNode was configured to run on NC: 457650eba6dca7dbe24354bf0809ba20">>}

      }}}}. Rebalance Operation Id = 4eed05384a65d4ae403fe7d9f1cb443d

       

      UPDATE (RC-2) : 

      • The same issue has this time been observed on AWS (RC-2)
      • Server is stuck in a rebalancing state while it shows `upgrading` status on control plane
      • CSP : AWS
      • Deploy Version : 7.2.5
      • Deploy image : couchbase-cloud-server-7.2.5-7596-x86_64-v1.0.32
      • Upgrade version : 7.2.6
      • Upgrade image : couchbase-cloud-server-7.2.6-8103-x86_64-v1.0.34
      • Rebalance while upgrading has been stuck due to dead worker on cbas service.

      Specific AWS Server Log : 

      Rebalance exited with reason {service_rebalance_failed,cbas, {worker_died, {'EXIT',<0.32519.440>, {rebalance_failed,

      {service_error, <<"Rebalance 06a51d6ef1ef6f212c2a09d93bfe5982 failed: The MetadataNode failed to bind before the configured timeout (60 seconds); the MetadataNode was configured to run on NC: d41a1deddf76ef20fd12c784cd8afeca">>}

      }}}}. Rebalance Operation Id = 7274b73c693b68ff270ebfd194f559dc

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MB-62977 Analytics service down while upgrade

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MB-63076 [System test][Analytics] Java.lang.NullPointerException

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
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              vipul.bhardwaj Vipul Bhardwaj
              vipul.bhardwaj Vipul Bhardwaj
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                Updated:
                Resolved:

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