kevinjqliu opened a new pull request, #18044:
URL: https://github.com/apache/iceberg/pull/18044
Closes #18043
The fixture runs `JdbcCatalog` on a file-backed SQLite db with the default
rollback journal, which only lets one connection touch the db at a time. When
multiple clients hit the fixture in parallel, one eventually fails with
`SQLITE_BUSY` ("database is locked").
This switches the default `CATALOG_URI` to
`jdbc:sqlite:/tmp/iceberg_catalog.db?journal_mode=WAL` so reads and writes
don't block each other. Also documents it in the README and updates the
kafka-connect docker-compose, which was still carrying
`jdbc:sqlite:file:/tmp/iceberg_rest_mode=memory` from the old databricks image
(not actually an option, just part of the filename).
Verified with sqlite-jdbc that the URI opens the db with `journal_mode=wal`.
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