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Backport of #72850 Add new HotThreads report type to capture allocated memory per Elasticsearch thread. Co-authored-by: zhangchao <80152403@qq.com>
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93 changes: 93 additions & 0 deletions
93
server/src/main/java/org/elasticsearch/monitor/jvm/SunThreadInfo.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License | ||
| * 2.0 and the Server Side Public License, v 1; you may not use this file except | ||
| * in compliance with, at your election, the Elastic License 2.0 or the Server | ||
| * Side Public License, v 1. | ||
| */ | ||
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| package org.elasticsearch.monitor.jvm; | ||
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| import org.apache.logging.log4j.LogManager; | ||
| import org.apache.logging.log4j.Logger; | ||
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| import java.lang.management.ThreadMXBean; | ||
| import java.lang.management.ManagementFactory; | ||
| import java.lang.reflect.Method; | ||
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| public class SunThreadInfo { | ||
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| private static final ThreadMXBean threadMXBean; | ||
| private static final Method getThreadAllocatedBytes; | ||
| private static final Method isThreadAllocatedMemorySupported; | ||
| private static final Method isThreadAllocatedMemoryEnabled; | ||
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| private static final Logger logger = LogManager.getLogger(SunThreadInfo.class); | ||
| public static final SunThreadInfo INSTANCE = new SunThreadInfo(); | ||
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| static { | ||
| threadMXBean = ManagementFactory.getThreadMXBean(); | ||
| getThreadAllocatedBytes = getMethod("getThreadAllocatedBytes", long.class); | ||
| isThreadAllocatedMemorySupported = getMethod("isThreadAllocatedMemorySupported"); | ||
| isThreadAllocatedMemoryEnabled = getMethod("isThreadAllocatedMemoryEnabled"); | ||
| } | ||
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| public boolean isThreadAllocatedMemorySupported() { | ||
| if (isThreadAllocatedMemorySupported == null) { | ||
| return false; | ||
| } | ||
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| try { | ||
| return (boolean) isThreadAllocatedMemorySupported.invoke(threadMXBean); | ||
| } catch (Exception e) { | ||
| logger.warn("exception while invoke isThreadAllocatedMemorySupported", e); | ||
| return false; | ||
| } | ||
| } | ||
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| public boolean isThreadAllocatedMemoryEnabled() { | ||
| if (isThreadAllocatedMemoryEnabled == null) { | ||
| return false; | ||
| } | ||
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| try { | ||
| return (boolean) isThreadAllocatedMemoryEnabled.invoke(threadMXBean); | ||
| } catch (Exception e) { | ||
| logger.warn("exception while invoke isThreadAllocatedMemoryEnabled", e); | ||
| return false; | ||
| } | ||
| } | ||
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| public long getThreadAllocatedBytes(long id) { | ||
| if (getThreadAllocatedBytes == null) { | ||
| return 0; | ||
| } | ||
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| if (isThreadAllocatedMemorySupported() == false || isThreadAllocatedMemoryEnabled() == false) { | ||
| return 0; | ||
| } | ||
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| if (id <= 0) { | ||
| return 0; | ||
| } | ||
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| try { | ||
| long bytes = (long) getThreadAllocatedBytes.invoke(threadMXBean, id); | ||
| assert bytes >= 0 : "OS reported a negative thread allocated size [" + bytes + "], thread id [" + id + "]."; | ||
| return Math.max(0, bytes); | ||
| } catch (Exception e) { | ||
| logger.warn("exception retrieving thread allocated memory", e); | ||
| return 0; | ||
| } | ||
| } | ||
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| private static Method getMethod(String methodName, Class<?>... parameterTypes) { | ||
| try { | ||
| Method method = Class.forName("com.sun.management.ThreadMXBean").getMethod(methodName, parameterTypes); | ||
| return method; | ||
| } catch (Exception e) { | ||
| // not available | ||
| return null; | ||
| } | ||
| } | ||
| } |
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