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https://issues.apache.org/jira/browse/LENS-576?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Deepak Barr updated LENS-576:
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Description:
In the event of lens server restart, We can not obtain the query result by
calling "/queryuiapi/queries/{queryHandle}/httpresultset" API as
LensPersistentResult does not get created. This is because QueryOutputFormatter
variable in QueryContext object is always null.This QueryOutputFormatter is
important to create LensPersistedResultSet (see getResultset() method in
QueryExecutionServiceImpl class) .
Reason : One can see that QueryOutputFormatter variable in QueryContext class
is not serialized. Therefore, on server restart, this variable is always null
in QueryContext for all queries.
Suggestion:
One way to solve this issue could be to simply serialize the
QueryOutputFormatter variable in QueryContext.
was:
In the event of lens server restart, We can not obtain the query result by
calling "/queryuiapi/queries/{queryHandle}/httpresultset" API as
LensPersistentResult is does not get created. This is because
QueryOutputFormatter variable in QueryContext object is always null.This
QueryOutputFormatter is important to create LensPersistedResultSet (see
getResultset() method in QueryExecutionServiceImpl class) .
Reason : One can see that QueryOutputFormatter variable in QueryContext class
is not serialized. Therefore, on server restart, this variable is always null
in QueryContext for all queries.
Suggestion:
One way to solve this issue could be to simply serialize the
QueryOutputFormatter variable in QueryContext.
> Cannot retrieve query results on lens server restart
> ----------------------------------------------------
>
> Key: LENS-576
> URL: https://issues.apache.org/jira/browse/LENS-576
> Project: Apache Lens
> Issue Type: Bug
> Reporter: Deepak Barr
>
> In the event of lens server restart, We can not obtain the query result by
> calling "/queryuiapi/queries/{queryHandle}/httpresultset" API as
> LensPersistentResult does not get created. This is because
> QueryOutputFormatter variable in QueryContext object is always null.This
> QueryOutputFormatter is important to create LensPersistedResultSet (see
> getResultset() method in QueryExecutionServiceImpl class) .
> Reason : One can see that QueryOutputFormatter variable in QueryContext class
> is not serialized. Therefore, on server restart, this variable is always null
> in QueryContext for all queries.
> Suggestion:
> One way to solve this issue could be to simply serialize the
> QueryOutputFormatter variable in QueryContext.
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