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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:
-----------------------------
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 and make QueryOutputFormatter
class serializable.
was:
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.
> 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 and make QueryOutputFormatter
> class serializable.
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