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Petr Pudlak authored
This allows to distinguish threads that don't have a job id, which is needed for answering queries. Since Python thread IDs aren't guaranteed to be unique, in future it'd be preferable to use a different, unique identifier. Note that this breaks 'gnt-debug locks'. Signed-off-by: Petr Pudlak <pudlak@google.com> Reviewed-by: Helga Velroyen <helgav@google.com>
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