org.apache.jackrabbit.oak.threadDump.ThreadDumpCleaner Maven / Gradle / Ivy
/*
* 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.jackrabbit.oak.threadDump;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.regex.Pattern;
/**
* A tool that removes uninteresting lines from stack traces.
*/
public class ThreadDumpCleaner {
private static final String[] PATTERN_ARRAY = {
"Threads class SMR info:(?s).*?\n\n",
"JNI global refs.*\n\n",
"\"Reference Handler\"(?s).*?\n\n",
"\"C1 CompilerThread(?s).*?\n\n",
"\"Concurrent Mark-Sweep GC Thread\".*\n",
"\"Exception Catcher Thread\".*\n",
"JNI global references:.*\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\n",
"\".*?\".*\n\n",
"\\$\\$YJP\\$\\$",
"\"(Attach|Service|VM|GC|DestroyJavaVM|Signal|AWT|AppKit|C2 |Low Mem|" +
"process reaper|YJPAgent-).*?\"(?s).*?\n\n",
" Locked ownable synchronizers:(?s).*?\n\n",
" Locked synchronizers:(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State: (TIMED_)?WAITING(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at sun.nio.ch.KQueueArrayWrapper.kevent0(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at java.io.FileInputStream.readBytes(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at sun.nio.ch.ServerSocketChannelImpl.accept(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at java.net.DualStackPlainSocketImpl.accept0(?s).*\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at sun.nio.ch.EPollArrayWrapper.epollWait(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at sun.nio.ch.EPoll.wait(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at java.lang.Object.wait(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at java.net.PlainSocketImpl.socketAccept(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at java.net.SocketInputStream.socketRead0(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at sun.nio.ch.WindowsSelectorImpl\\$SubSelector.poll0(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at sun.management.ThreadImpl.dumpThreads0(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at sun.misc.Unsafe.park(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at java.net.PlainSocketImpl.socketClose0(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at java.net.PlainSocketImpl.socketAvailable(?s).*?\n\n",
"\".*?\".*?\n java.lang.Thread.State:.*\n\t" +
"at java.net.PlainSocketImpl.socketConnect(?s).*?\n\n",
"\n\n",
};
private static ArrayList PATTERNS = new ArrayList();
static {
for (String s : PATTERN_ARRAY) {
PATTERNS.add(Pattern.compile(s));
}
}
public static File process(File file) throws IOException {
String fileName = file.getName();
if (fileName.endsWith(".txt")) {
fileName = fileName.substring(0, fileName.length() - ".txt".length());
}
File target = new File(file.getParentFile(), fileName + ".filtered.txt");
PrintWriter writer = new PrintWriter(new BufferedWriter(
new FileWriter(target)));
try {
processFile(file, writer);
} finally {
writer.close();
}
return target;
}
private static void processFile(File file, PrintWriter writer) throws IOException {
LineNumberReader r = new LineNumberReader(new BufferedReader(
new FileReader(file)));
try {
process(r, writer);
} finally {
r.close();
}
}
private static void process(LineNumberReader reader, PrintWriter writer) throws IOException {
StringBuilder buff = new StringBuilder();
int activeThreadCount = 0;
while (true) {
String line = reader.readLine();
if (line == null) {
break;
}
if (line.startsWith("Full thread dump") || line.startsWith("Full Java thread dump")) {
if (activeThreadCount > 0) {
// System.out.println("Active threads: " + activeThreadCount);
}
activeThreadCount = 0;
}
line = removeModuleName(line);
buff.append(line).append('\n');
if (line.trim().length() == 0) {
String filtered = filter(buff.toString());
if (filtered.trim().length() > 10) {
activeThreadCount++;
}
writer.print(filtered);
buff = new StringBuilder();
}
}
writer.println(filter(buff.toString()));
}
private static String removeModuleName(String line) {
// remove the module name, for example in:
// at [email protected]/sun.nio.ch.ServerSocketChannelImpl.accept
// at [email protected]/sun.management.
// at platform/[email protected]/javax.script.SimpleBindings
int atChar = line.indexOf('@');
if (atChar < 0) {
return line;
}
int slash = line.indexOf('/', atChar);
if (slash < 0) {
return line;
}
int start = line.indexOf("at ");
if (start < 0 || start > atChar) {
return line;
}
start += 2;
// at java.lang.Object.wait([email protected]/Native Method) ->
// at java.lang.Object.wait(Native Method) ->
int open = line.indexOf('(');
if (open > start && open < atChar) {
start = open + 1;
}
// String moduleName = line.substring(at + 3, slash);
// module names seen so far:
// [email protected]
// [email protected]
// [email protected]
// [email protected]
// platform/[email protected]
// removing the module name
line = line.substring(0, start) + line.substring(slash + 1);
return line;
}
private static String filter(String s) {
for (Pattern p : PATTERNS) {
s = p.matcher(s).replaceAll("");
}
return s;
}
}
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