[jira] [Created] (ASTERIXDB-1076) False failures triggers denying new queries

["Yingyi Bu (JIRA)" <ji...@apache.org>]

Yingyi Bu created ASTERIXDB-1076:
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             Summary: False failures triggers denying new queries
                 Key: ASTERIXDB-1076
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-1076
             Project: Apache AsterixDB
          Issue Type: Bug
          Components: AsterixDB
            Reporter: Yingyi Bu
            Priority: Critical


When CPUs in the cluster are saturated for computations,  the heartbeat from slave nodes to the master node might get delayed.  In this case, the master node thinks a node fails, and can no longer adds the node back.  Hence, the entire cluster is not usable and an instance restart is needed.

Two things need to be fixed:
1.  (at least) expose AsterixDB configuration parameters to allow users to set a large heartbeat threshold;
2.  allow a node to leave and re-join a hyracks cluster.

In the long term, we might need to investigate better liveness check strategies.


To reproduce that issue,  just let slave nodes' CPUs overloaded and you will see that.



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