Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/4358#discussion_r137292784
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/blob/TransientBlobService.java
---
@@ -0,0 +1,171 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.blob;
+
+import org.apache.flink.api.common.JobID;
+
+import java.io.Closeable;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * A service to retrieve transient binary large objects (BLOBs).
+ * <p>
+ * These include per-job BLOBs that are , e.g. a job's JAR files, parts of
an off-loaded {@link
--- End diff --
I thought that job's JAR files are stored in the permanent blob service?
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