[arrow] Normalize timezone strings for arrow-rust compatibility#7705
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JingsongLi merged 3 commits intoApr 29, 2026
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…he#7704) ZoneId.systemDefault().toString() can produce GMT-prefix timezone strings like GMT-10:00 which arrow-rust cannot parse. Using normalized() converts these to standard formats that arrow-rust accepts: GMT-prefix offsets become UTC offsets (-10:00), GMT/UTC become Z, and IANA names pass through unchanged.
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@plusplusjiajia @JingsongLi Please have a look |
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Summary
Fixes #7704.
ZoneId.systemDefault().toString()can produce GMT-prefix timezone strings likeGMT-10:00when the JVM timezone is set to a GMT-prefix offset. Arrow-rust doesn't recognize theGMTprefix and rejects these strings.normalized()converts them to formats arrow-rust accepts:GMT-10:00becomes-10:00GMT+05:30becomes+05:30UTC/GMTbecomesZAmerica/New_Yorkpass through unchangedThis was discovered while investigating #6648. The CI randomizes
-Duser.timezoneand hitGMT+5:00, which triggered a crash in the Lance native writer.