Repository: hadoop Updated Branches: refs/heads/branch-2.7 d053d1c3f -> bd1676359
HADOOP-12259. Utility to Dynamic port allocation (brahmareddy via rkanter) (cherry picked from commit ee233ec95ce8cfc8309d3adc072d926cd85eba08) (cherry picked from commit 731ed9cad81f91e9da18148f0c4757a38ca406f6) Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/bd167635 Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/bd167635 Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/bd167635 Branch: refs/heads/branch-2.7 Commit: bd16763591ec24c7f180353990d1644655968e66 Parents: d053d1c Author: Robert Kanter <rkan...@apache.org> Authored: Fri Jul 24 09:41:53 2015 -0700 Committer: Zhe Zhang <z...@apache.org> Committed: Tue Oct 18 10:25:52 2016 -0700 ---------------------------------------------------------------------- hadoop-common-project/hadoop-common/CHANGES.txt | 1 + .../org/apache/hadoop/net/ServerSocketUtil.java | 63 ++++++++++++++++++++ 2 files changed, 64 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/hadoop/blob/bd167635/hadoop-common-project/hadoop-common/CHANGES.txt ---------------------------------------------------------------------- diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt index 4f16aa6..ffbc311 100644 --- a/hadoop-common-project/hadoop-common/CHANGES.txt +++ b/hadoop-common-project/hadoop-common/CHANGES.txt @@ -7,6 +7,7 @@ Release 2.7.4 - UNRELEASED NEW FEATURES IMPROVEMENTS + HADOOP-12259. Utility to Dynamic port allocation (brahmareddy via rkanter) OPTIMIZATIONS http://git-wip-us.apache.org/repos/asf/hadoop/blob/bd167635/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"); + } + } + } + } + +} --------------------------------------------------------------------- To unsubscribe, e-mail: common-commits-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-commits-h...@hadoop.apache.org