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Posted to common-commits@hadoop.apache.org by zj...@apache.org on 2015/07/27 22:08:09 UTC
[27/50] [abbrv] hadoop git commit: HADOOP-12259. Utility to Dynamic
port allocation (brahmareddy via rkanter)
HADOOP-12259. Utility to Dynamic port allocation (brahmareddy via rkanter)
Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/5e1eb48c
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/5e1eb48c
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/5e1eb48c
Branch: refs/heads/YARN-2928
Commit: 5e1eb48cff1ecf32287617ee56a6d84ec8f38ca7
Parents: 21c9cb8
Author: Robert Kanter <rk...@apache.org>
Authored: Fri Jul 24 09:41:53 2015 -0700
Committer: Zhijie Shen <zj...@apache.org>
Committed: Mon Jul 27 12:57:35 2015 -0700
----------------------------------------------------------------------
hadoop-common-project/hadoop-common/CHANGES.txt | 2 +
.../org/apache/hadoop/net/ServerSocketUtil.java | 63 ++++++++++++++++++++
2 files changed, 65 insertions(+)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/5e1eb48c/hadoop-common-project/hadoop-common/CHANGES.txt
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diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index 56edcac..d6d43f2 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -725,6 +725,8 @@ Release 2.8.0 - UNRELEASED
HADOOP-12189. Improve CallQueueManager#swapQueue to make queue elements
drop nearly impossible. (Zhihai Xu via wang)
+ HADOOP-12259. Utility to Dynamic port allocation (brahmareddy via rkanter)
+
OPTIMIZATIONS
HADOOP-11785. Reduce the number of listStatus operation in distcp
http://git-wip-us.apache.org/repos/asf/hadoop/blob/5e1eb48c/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/net/ServerSocketUtil.java
----------------------------------------------------------------------
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/net/ServerSocketUtil.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/net/ServerSocketUtil.java
new file mode 100644
index 0000000..0ce835f
--- /dev/null
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/net/ServerSocketUtil.java
@@ -0,0 +1,63 @@
+/**
+ * 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.hadoop.net;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.util.Random;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+public class ServerSocketUtil {
+
+ private static final Log LOG = LogFactory.getLog(ServerSocketUtil.class);
+
+ /**
+ * Port scan & allocate is how most other apps find ports
+ *
+ * @param port given port
+ * @param retries number of retires
+ * @return
+ * @throws IOException
+ */
+ public static int getPort(int port, int retries) throws IOException {
+ Random rand = new Random();
+ int tryPort = port;
+ int tries = 0;
+ while (true) {
+ if (tries > 0) {
+ tryPort = port + rand.nextInt(65535 - port);
+ }
+ LOG.info("Using port " + tryPort);
+ try (ServerSocket s = new ServerSocket(tryPort)) {
+ return tryPort;
+ } catch (IOException e) {
+ tries++;
+ if (tries >= retries) {
+ LOG.info("Port is already in use; giving up");
+ throw e;
+ } else {
+ LOG.info("Port is already in use; trying again");
+ }
+ }
+ }
+ }
+
+}