Description of problem:

A customer had encountered problems with their VM backup utility, which resulted in multiple locked snapshots. They restarted the ovirt-engine service, and thereafter were unable to login to the Admin Portal, which displayed the following error in the browser window;

"(org.ovirt.engine.core.common.action.ActionType,org.ovirt.engine.core.common.action.ActionParametersBase,org.ovirt.engine.core.bll.context.CommandContext): javax.ejb.EJBException: org.apache.commons.lang.SerializationException: org.codehaus.jackson.map.JsonMappingException: No default constructor for [collection type; class java.util.HashMap$KeySet, contains [simple type, class org.ovirt.engine.core.compat.Guid]] (through reference chain: org.ovirt.engine.core.common.action.CreateSnapshotForVmParameters["diskIds"])"


The 'command-entities' table contained 124 entries with the 'command_params_class' field containing one of the following;

  - "org.ovirt.engine.core.common.action.CreateSnapshotForVmParameters"
  - "org.ovirt.engine.core.common.action.CreateSnapshotDiskParameters"


When these were removed, the Admin Portal became accessible.

 

Version-Release number of selected component (if applicable):

RHV 4.2.5


How reproducible:

It happened every time until some 'command_entities' entries were removed from the database.


Steps to Reproduce:
1.
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Actual results:

Admin Portal was inaccessible as a result of multiple snapshot creation failures.


Expected results:

Access to the Admin Portal should be allowed regardless of existing snapshot creation command entities.


Additional info: