yujun777 opened a new pull request, #63882:
URL: https://github.com/apache/doris/pull/63882
### What problem does this PR solve?
FollowerColumnSender drains queued column references on follower FEs and
syncs the columns that still need analysis to the master. A queued column can
become stale after DDL changes. If the table still exists but the queued column
has been dropped, table.getColumn(column.colName) returns null and the sender
throws a NullPointerException while reading the type.
This patch skips dropped columns before checking the column type, so the
daemon does not emit periodic ERROR logs and can continue processing the
remaining queued columns.
Issue Number: close #xxx
### Release note
None
### Check List (For Author)
- Test: Unit Test
- org.apache.doris.statistics.FollowerColumnSenderTest
- Behavior changed: No
- Does this need documentation: No
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