koodin9 opened a new pull request, #5775:
URL: https://github.com/apache/hive/pull/5775
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### What changes were proposed in this pull request?
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Added logic within the `reconnect()` method to obtain a Delegation Token for
the proxy user if the `HADOOP_PROXY_USER` environment variable is set.
### Why are the changes needed?
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When the Hive Metastore is restarted, the `reconnect()` method of the
`HiveMetaStoreClient` included in the Iceberg API fails (when
`HADOOP_PROXY_USER` is configured without this change).
### Does this PR introduce _any_ user-facing change?
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Yes, this affects users who specifically set the `HADOOP_PROXY_USER`
environment variable. (The behavior upon HMS restart will change from failure
to success for them).
### How was this patch tested?
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Testing was conducted using Kafka Connect with the Iceberg Sink Connector to
save data to an Iceberg table.
During the test, while write operations were in progress, the connected Hive
Metastore was restarted.
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