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https://issues.apache.org/jira/browse/CASSANDRA-13991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16239598#comment-16239598
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ZhaoYang commented on CASSANDRA-13991:
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[~mildebrandt] Thanks for the report.
I think it's gocql driver issue of re-writing the output buffer of
{{iter.PageState()}} ( This
[value|https://github.com/gocql/gocql/blob/aa93acc8f067e9233982b9a7de370e4d64b9c33e/session.go#L1303]
is probably reused internally in gocql).
I am not familiar with golang spec, but you can try clone the output of
{{iter.PageState()}} .
{code}
cloned_paging := make([]byte, len(next))
copy(cloned_paging, next)
{code}
Do you mind create an issue on gocql github?
At the same time, in Cassandra, we could improve the error handling with null
PK for range pager.
> NullPointerException when querying a table with a previous state
> ----------------------------------------------------------------
>
> Key: CASSANDRA-13991
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13991
> Project: Cassandra
> Issue Type: Bug
> Components: CQL
> Reporter: Chris mildebrandt
> Attachments: CASSANDRA-13991.log
>
>
> Performing the following steps (using the gocql library) results in an NPE:
> * With a table of 12 entries, read all rows.
> * Set the page size to 1 and read the first row. Save the query state.
> * Read all the row again.
> * Set the page size to 5 and the page state to the previous state. (This is
> where the NPE occurs).
> This can be reproduced with the following project:
> https://github.com/eyeofthefrog/CASSANDRA-13991
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