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https://issues.apache.org/jira/browse/FLINK-8174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16278569#comment-16278569
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ASF GitHub Bot commented on FLINK-8174:
---------------------------------------
Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/5114#discussion_r154870701
--- Diff:
flink-mesos/src/main/java/org/apache/flink/mesos/util/MesosResourceAllocation.java
---
@@ -0,0 +1,197 @@
+/*
+ * 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.mesos.util;
+
+import org.apache.mesos.Protos;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.Set;
+
+import static org.apache.flink.mesos.Utils.print;
+
+/**
+ * An allocation of resources on a particular host from one or more Mesos
offers, to be portioned out to tasks.
+ *
+ * <p>This class assumes that the resources were offered <b>without</b>
the {@code RESERVATION_REFINEMENT} capability,
+ * as detailed in the "Resource Format" section of the Mesos protocol
definition.
+ *
+ * <p>This class is not thread-safe.
+ */
+public class MesosResourceAllocation {
+
+ protected static final Logger LOG =
LoggerFactory.getLogger(MesosResourceAllocation.class);
+
+ static final double EPSILON = 1e-5;
+ static final String UNRESERVED_ROLE = "*";
+
+ private final List<Protos.Resource> resources;
+
+ /**
+ * Creates an allocation of resources for tasks to take.
+ *
+ * @param resources the resources to add to the allocation.
+ */
+ public MesosResourceAllocation(Collection<Protos.Resource> resources) {
+ this.resources = new ArrayList<>(resources);
--- End diff --
null check is missing.
> Mesos RM unable to accept offers for unreserved resources
> ---------------------------------------------------------
>
> Key: FLINK-8174
> URL: https://issues.apache.org/jira/browse/FLINK-8174
> Project: Flink
> Issue Type: Bug
> Components: Mesos
> Affects Versions: 1.4.0, 1.3.3
> Reporter: Eron Wright
> Assignee: Eron Wright
> Priority: Blocker
> Fix For: 1.4.0
>
>
> Flink has suffered a regression due to FLINK-7294. Any attempt to accept a
> resource offer that is based on unreserved resources will fail, because Flink
> (as of FLINK-7294) erroneously insists that the resource come from a prior
> reservation.
> Looking at the original issue, the problem may have been misdiagnosed.
> Ideally Flink should work with both reserved and unreserved resources, but
> the latter is a more common situation that is now broken.
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