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spring-integration/spring-integration-file
Artem Bilan 467c96171e Fix NPE in the AbstractInboundFileSynchronizer for remote dir
Related to: #9129

The `remoteDirectoryPath` might be `null`, so it is not correct to attempt `remoteDirectoryPath.charAt(0)`.
Plus `/null` is not correct path.

* Use `/` for empty remote dir.
* Check for `remoteDirectoryPath != null`

**Auto-cherry-pick to `6.2.x` & `6.1.x`**
2024-05-08 16:11:53 -04:00
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