| /* |
| * 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.solr.handler.admin; |
| |
| import java.io.IOException; |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.ThreadInfo; |
| import java.lang.management.LockInfo; |
| import java.lang.management.ThreadMXBean; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Locale; |
| |
| import org.apache.solr.common.util.NamedList; |
| import org.apache.solr.common.util.SimpleOrderedMap; |
| import org.apache.solr.handler.RequestHandlerBase; |
| import org.apache.solr.request.SolrQueryRequest; |
| import org.apache.solr.response.SolrQueryResponse; |
| |
| import static org.apache.solr.common.params.CommonParams.ID; |
| import static org.apache.solr.common.params.CommonParams.NAME; |
| |
| /** |
| * |
| * @since solr 1.2 |
| */ |
| public class ThreadDumpHandler extends RequestHandlerBase |
| { |
| @Override |
| public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws IOException |
| { |
| SimpleOrderedMap<Object> system = new SimpleOrderedMap<>(); |
| rsp.add( "system", system ); |
| |
| ThreadMXBean tmbean = ManagementFactory.getThreadMXBean(); |
| |
| // Thread Count |
| SimpleOrderedMap<Object> nl = new SimpleOrderedMap<>(); |
| nl.add( "current",tmbean.getThreadCount() ); |
| nl.add( "peak", tmbean.getPeakThreadCount() ); |
| nl.add( "daemon", tmbean.getDaemonThreadCount() ); |
| system.add( "threadCount", nl ); |
| |
| // Deadlocks |
| ThreadInfo[] tinfos; |
| long[] tids = tmbean.findDeadlockedThreads(); |
| if (tids != null) { |
| tinfos = tmbean.getThreadInfo(tids, Integer.MAX_VALUE); |
| NamedList<SimpleOrderedMap<Object>> lst = new NamedList<>(); |
| for (ThreadInfo ti : tinfos) { |
| if (ti != null) { |
| lst.add( "thread", getThreadInfo( ti, tmbean ) ); |
| } |
| } |
| system.add( "deadlocks", lst ); |
| } |
| |
| // Now show all the threads.... |
| |
| tinfos = tmbean.dumpAllThreads(true, true); |
| NamedList<SimpleOrderedMap<Object>> lst = new NamedList<>(); |
| for (ThreadInfo ti : tinfos) { |
| if (ti != null) { |
| lst.add( "thread", getThreadInfo( ti, tmbean ) ); |
| } |
| } |
| system.add( "threadDump", lst ); |
| rsp.setHttpCaching(false); |
| } |
| |
| //-------------------------------------------------------------------------------- |
| //-------------------------------------------------------------------------------- |
| |
| private static SimpleOrderedMap<Object> getThreadInfo( ThreadInfo ti, ThreadMXBean tmbean ) { |
| SimpleOrderedMap<Object> info = new SimpleOrderedMap<>(); |
| long tid = ti.getThreadId(); |
| |
| info.add( ID, tid ); |
| info.add(NAME, ti.getThreadName()); |
| info.add( "state", ti.getThreadState().toString() ); |
| |
| if (ti.getLockName() != null) { |
| // TODO: this is redundent with lock-waiting below .. deprecate & remove |
| // TODO: (but first needs UI change) |
| info.add( "lock", ti.getLockName() ); |
| } |
| { final LockInfo lockInfo = ti.getLockInfo(); |
| if (null != lockInfo) { |
| final SimpleOrderedMap<Object> lock = new SimpleOrderedMap<>(); |
| info.add("lock-waiting", lock); |
| lock.add(NAME, lockInfo.toString()); |
| if (-1 == ti.getLockOwnerId() && null == ti.getLockOwnerName()) { |
| lock.add("owner", null ); |
| } else { |
| final SimpleOrderedMap<Object> owner = new SimpleOrderedMap<>(); |
| lock.add("owner", owner); |
| owner.add(NAME, ti.getLockOwnerName()); |
| owner.add( ID, ti.getLockOwnerId() ); |
| } |
| } |
| } |
| { final LockInfo[] synchronizers = ti.getLockedSynchronizers(); |
| if (0 < synchronizers.length) { |
| final List<String> locks = new ArrayList<>(synchronizers.length); |
| info.add("synchronizers-locked", locks); |
| for (LockInfo sync : synchronizers) { |
| locks.add(sync.toString()); |
| } |
| } |
| } |
| { final LockInfo[] monitors = ti.getLockedMonitors(); |
| if (0 < monitors.length) { |
| final List<String> locks = new ArrayList<>(monitors.length); |
| info.add("monitors-locked", locks); |
| for (LockInfo monitor : monitors) { |
| locks.add(monitor.toString()); |
| } |
| } |
| } |
| |
| |
| |
| |
| if (ti.isSuspended()) { |
| info.add( "suspended", true ); |
| } |
| if (ti.isInNative()) { |
| info.add( "native", true ); |
| } |
| |
| if (tmbean.isThreadCpuTimeSupported()) { |
| info.add( "cpuTime", formatNanos(tmbean.getThreadCpuTime(tid)) ); |
| info.add( "userTime", formatNanos(tmbean.getThreadUserTime(tid)) ); |
| } |
| |
| // Add the stack trace |
| int i=0; |
| String[] trace = new String[ti.getStackTrace().length]; |
| for( StackTraceElement ste : ti.getStackTrace()) { |
| trace[i++] = ste.toString(); |
| } |
| info.add( "stackTrace", trace ); |
| return info; |
| } |
| |
| private static String formatNanos(long ns) { |
| return String.format(Locale.ROOT, "%.4fms", ns / (double) 1000000); |
| } |
| |
| //////////////////////// SolrInfoMBeans methods ////////////////////// |
| |
| @Override |
| public String getDescription() { |
| return "Thread Dump"; |
| } |
| |
| @Override |
| public Category getCategory() { |
| return Category.ADMIN; |
| } |
| } |