[Bug] ArrowFieldTypeConversion produces GMT-prefix timezone strings that arrow-rust cannot parse

[0dunay0]

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Paimon version

master (1.5-SNAPSHOT)

Compute Engine

Any (affects paimon-arrow module used by Spark, Flink, etc.)

Minimal reproduce step

Set JVM timezone to a GMT-prefix offset (e.g. -Duser.timezone=GMT+5:00), then use any code path that converts LocalZonedTimestampType through ArrowFieldTypeConversion.ArrowFieldTypeVisitor.

ZoneId.systemDefault().toString() produces GMT+05:00, which arrow-rust rejects because it doesn't recognize the GMT prefix.

This is reproducible in CI when the JVM timezone is randomized to a GMT-prefix offset.

What doesn't meet your expectations?

ArrowFieldTypeConversion should produce timezone strings that arrow-rust can parse. Using ZoneId.systemDefault().normalized().toString() converts GMT-prefix offsets to the standard UTC offset format (e.g. +05:00), GMT/UTC to Z, and leaves IANA names like America/New_York unchanged. Arrow-rust accepts all of these.

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!