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https://issues.apache.org/jira/browse/FLINK-35440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17849132#comment-17849132
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Zach commented on FLINK-35440:
------------------------------
After the above pull request, a new error is seen
```\{"ts":"2024-05-23T20:59:19.463","pid":97497,"tid":"7120f","sev":"info","req":"-","sess":"-","site":"-","user":"-","k":"end-protocol.query","l":{},"a":\{"depth":4,"elapsed":0.995,"exclusive":0.995,"id":"P8RI+WqHEfuLJSiVnHo5Mu","name":"protocol.query","rk":"exception","root":"DhXdXdGsUU/JYsr0MZE8iE","rv":{"e-code":"0xFAB9A2C5","e-source":"NeedsClassification","e-status-code":"2","msg":"\"java.lang.ClassCastException:
class java.lang.Integer cannot be cast to class java.lang.Long
(java.lang.Integer and java.lang.Long are in module java.base of loader
'bootstrap')\n\"","type":"ConnectivityException"},"sponsor":"JhI/Z+7h0BrIJHSP0v9JKb","type":"end"},"v":\{"cols":0,"is-command":false,"protocol-class":"genericjdbc","protocol-id":2,"query-category":"Metadata","query-hash":2970729448,"query-tags":"","query-trunc":"SELECT
1","rows":0},"ctx":{}}```
> unable to connect tableau to jdbc flink url using flink sql driver
> ------------------------------------------------------------------
>
> Key: FLINK-35440
> URL: https://issues.apache.org/jira/browse/FLINK-35440
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / JDBC
> Affects Versions: 1.19.0, 1.20.0
> Reporter: Zach
> Priority: Minor
> Labels: pull-request-available
>
> Tableau 2023.1 using
> [https://repo.maven.apache.org/maven2/org/apache/flink/flink-sql-jdbc-driver-bundle/]
> version 1.19.0 yields the following error when a connection is established
> to a local flink sql cluster using the uri
> {{{}jdbc:{}}}{{{}[flink://localhost:8083]{}}}
> {{{"ts":"2024-05-23T14:21:05.858","pid":12172,"tid":"6a70","sev":"error","req":"-","sess":"-","site":"-","user":"-","k":"jdbc-error","e":\{"excp-error-code":"0xFAB9A2C5","excp-source":"NeedsClassification","excp-status-code":"UNKNOWN"},"v":\{"context":"GrpcProtocolProxy::IsConnected
>
> (D:\\tc\\work\\t231\\g_pc\\modules\\connectors\\tabmixins\\main\\db\\GrpcProtocolProxy.cpp:456)","driver-name":"org.apache.flink.table.jdbc.FlinkDriver","driver-version":"1.19.0","error-code":"0","error-messages":["FlinkConnection#isValid
> is not supported
> yet."],"grpc-status-code":"2","protocol-id":3,"sql-state":"0"}}}}
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