jun-he opened a new pull request #790: Improve getWriter in BaseRewriteManifests URL: https://github.com/apache/incubator-iceberg/pull/790 Here, the `writers` object is not volatile and the double checked locking might not be thread safe. Instead, use concurrent map's atomic computeIfAbsent method to improve it. Related issue: https://github.com/apache/incubator-iceberg/issues/726.
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