Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/3512#discussion_r106677799
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/blob/BlobServer.java ---
@@ -400,6 +418,47 @@ public void delete(BlobKey key) throws IOException {
}
/**
+ * Deletes the file associated with the given job and key if it exists
in the local
+ * storage of the blob server.
+ *
+ * @param jobId JobID of the file in the blob store
+ * @param key String key of the file in the blob store
+ */
+ @Override
+ public void delete(JobID jobId, String key) {
+ checkArgument(jobId != null, "Job id must not be null.");
+ checkArgument(key != null, "BLOB name must not be null.");
+
+ final File localFile = BlobUtils.getStorageLocation(storageDir,
jobId, key);
+
+ if (localFile.exists()) {
--- End diff --
From concurrency safety, it better to do `if (!delete && exists)`
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