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HBASE-24072 Nightlies reporting OutOfMemoryError: unable to create new native thread DEBUG. NOT FOR COMMIT.
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‎hbase-common/src/test/java/org/apache/hadoop/hbase/TestPrintEnv.java

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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.hbase;
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import com.sun.management.UnixOperatingSystemMXBean;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.lang.management.ManagementFactory;
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import org.apache.hadoop.hbase.testclassification.SmallTests;
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import org.junit.ClassRule;
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import org.junit.Test;
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import org.junit.experimental.categories.Category;
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@Category(SmallTests.class)
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public class TestPrintEnv {
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@ClassRule
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public static final HBaseClassTestRule CLASS_RULE =
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HBaseClassTestRule.forClass(TestPrintEnv.class);
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private static Object S = new Object();
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private static int COUNT = 0;
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@Test
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public void testupu() throws Exception {
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Process p = Runtime.getRuntime().exec(new String [] {"/bin/bash", "-c", "ulimit -u"});
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int errCode = p.waitFor();
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System.out.println("errCode=" + errCode);
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BufferedReader is = new BufferedReader(new InputStreamReader(p.getInputStream()));
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String line;
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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is.close();
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is = new BufferedReader(new InputStreamReader(p.getErrorStream()));
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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p = Runtime.getRuntime().exec(new String [] {"/bin/bash", "-c", "ulimit -u 10001"});
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errCode = p.waitFor();
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System.out.println("errCode=" + errCode);
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is = new BufferedReader(new InputStreamReader(p.getInputStream()));
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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is.close();
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is = new BufferedReader(new InputStreamReader(p.getErrorStream()));
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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p = Runtime.getRuntime().exec(new String [] {"/bin/bash", "-c", "ulimit -u"});
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errCode = p.waitFor();
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System.out.println("errCode=" + errCode);
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is = new BufferedReader(new InputStreamReader(p.getInputStream()));
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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is.close();
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is = new BufferedReader(new InputStreamReader(p.getErrorStream()));
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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}
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@Test
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public void testmvnversion() throws Exception {
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Process p = Runtime.getRuntime().exec(new String [] {"/bin/bash", "-c", "mvn --version"});
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int errCode = p.waitFor();
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System.out.println("errCode=" + errCode);
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BufferedReader is = new BufferedReader(new InputStreamReader(p.getInputStream()));
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String line;
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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is.close();
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is = new BufferedReader(new InputStreamReader(p.getErrorStream()));
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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}
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@Test
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public void testn() throws Exception {
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Process p = Runtime.getRuntime().exec(new String [] {"/bin/bash", "-c", "ulimit -n"});
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int errCode = p.waitFor();
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System.out.println("errCode=" + errCode);
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BufferedReader is = new BufferedReader(new InputStreamReader(p.getInputStream()));
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String line;
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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is.close();
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is = new BufferedReader(new InputStreamReader(p.getErrorStream()));
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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}
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@Test
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public void testa() throws Exception {
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Process p = Runtime.getRuntime().exec(new String [] {"/bin/bash", "-c", "ulimit -a"});
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int errCode = p.waitFor();
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System.out.println("errCode=" + errCode);
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BufferedReader is = new BufferedReader(new InputStreamReader(p.getInputStream()));
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String line;
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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is.close();
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is = new BufferedReader(new InputStreamReader(p.getErrorStream()));
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while ((line = is.readLine()) != null) {
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System.out.println(line);
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}
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}
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@Test
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public void testfds() throws InterruptedException, IOException {
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final UnixOperatingSystemMXBean osMBean =
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(UnixOperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
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System.out.println("opendfs: " + osMBean.getOpenFileDescriptorCount());
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System.out.println("maxfds: " + osMBean.getMaxFileDescriptorCount());
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}
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/*
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@org.junit.Ignore @Test
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public void testthreds() throws InterruptedException, IOException {
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try {
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Runtime rt = Runtime.getRuntime();
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while (true) {
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new Thread(new Runnable() {
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public void run() {
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synchronized (S) {
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COUNT += 1;
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System.err.println("New thread #" + COUNT);
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}
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for (; ; ) {
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try {
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Thread.sleep(10);
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} catch (Exception e) {
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System.err.println(e);
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}
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}
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}
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}).start();
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Thread.sleep(10);
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}
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} catch (Throwable t) {
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}
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}
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*/
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}

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