private void maybeLogHeapDetails() {
JvmInfo jvmInfo = JvmInfo.jvmInfo();
ByteSizeValue maxHeapSize = jvmInfo.getMem().getHeapMax();
String useCompressedOops = jvmInfo.useCompressedOops();
logger.info(
"heap size [{}], compressed ordinary object pointers [{}]", maxHeapSize, useCompressedOops);
}
static {
RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();
MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
// returns the <process id>@<host>
long pid;
String xPid = runtimeMXBean.getName();
try {
xPid = xPid.split("@")[0];
pid = Long.parseLong(xPid);
} catch (Exception e) {
pid = -1;
}
JvmInfo info = new JvmInfo();
info.pid = pid;
info.startTime = runtimeMXBean.getStartTime();
info.version = System.getProperty("java.version");
info.vmName = runtimeMXBean.getVmName();
info.vmVendor = runtimeMXBean.getVmVendor();
info.vmVersion = runtimeMXBean.getVmVersion();
info.mem = new Mem();
info.mem.heapInit =
memoryMXBean.getHeapMemoryUsage().getInit() < 0
? 0
: memoryMXBean.getHeapMemoryUsage().getInit();
info.mem.heapMax =
memoryMXBean.getHeapMemoryUsage().getMax() < 0
? 0
: memoryMXBean.getHeapMemoryUsage().getMax();
info.mem.nonHeapInit =
memoryMXBean.getNonHeapMemoryUsage().getInit() < 0
? 0
: memoryMXBean.getNonHeapMemoryUsage().getInit();
info.mem.nonHeapMax =
memoryMXBean.getNonHeapMemoryUsage().getMax() < 0
? 0
: memoryMXBean.getNonHeapMemoryUsage().getMax();
try {
Class<?> vmClass = Class.forName("sun.misc.VM");
info.mem.directMemoryMax = (Long) vmClass.getMethod("maxDirectMemory").invoke(null);
} catch (Exception t) {
// ignore
}
info.inputArguments =
runtimeMXBean
.getInputArguments()
.toArray(new String[runtimeMXBean.getInputArguments().size()]);
try {
info.bootClassPath = runtimeMXBean.getBootClassPath();
} catch (UnsupportedOperationException e) {
// oracle java 9
info.bootClassPath = System.getProperty("sun.boot.class.path");
if (info.bootClassPath == null) {
// something else
info.bootClassPath = "<unknown>";
}
}
info.classPath = runtimeMXBean.getClassPath();
info.systemProperties = Collections.unmodifiableMap(runtimeMXBean.getSystemProperties());
List<GarbageCollectorMXBean> gcMxBeans = ManagementFactory.getGarbageCollectorMXBeans();
info.gcCollectors = new String[gcMxBeans.size()];
for (int i = 0; i < gcMxBeans.size(); i++) {
GarbageCollectorMXBean gcMxBean = gcMxBeans.get(i);
info.gcCollectors[i] = gcMxBean.getName();
}
List<MemoryPoolMXBean> memoryPoolMXBeans = ManagementFactory.getMemoryPoolMXBeans();
info.memoryPools = new String[memoryPoolMXBeans.size()];
for (int i = 0; i < memoryPoolMXBeans.size(); i++) {
MemoryPoolMXBean memoryPoolMXBean = memoryPoolMXBeans.get(i);
info.memoryPools[i] = memoryPoolMXBean.getName();
}
try {
@SuppressWarnings("unchecked")
Class<? extends PlatformManagedObject> clazz =
(Class<? extends PlatformManagedObject>)
Class.forName("com.sun.management.HotSpotDiagnosticMXBean");
Class<?> vmOptionClazz = Class.forName("com.sun.management.VMOption");
PlatformManagedObject hotSpotDiagnosticMXBean = ManagementFactory.getPlatformMXBean(clazz);
Method vmOptionMethod = clazz.getMethod("getVMOption", String.class);
Method valueMethod = vmOptionClazz.getMethod("getValue");
try {
Object onError = vmOptionMethod.invoke(hotSpotDiagnosticMXBean, "OnError");
info.onError = (String) valueMethod.invoke(onError);
} catch (Exception ignored) {
}
try {
Object onOutOfMemoryError =
vmOptionMethod.invoke(hotSpotDiagnosticMXBean, "OnOutOfMemoryError");
info.onOutOfMemoryError = (String) valueMethod.invoke(onOutOfMemoryError);
} catch (Exception ignored) {
}
try {
Object useCompressedOopsVmOption =
vmOptionMethod.invoke(hotSpotDiagnosticMXBean, "UseCompressedOops");
info.useCompressedOops = (String) valueMethod.invoke(useCompressedOopsVmOption);
} catch (Exception ignored) {
}
try {
Object useG1GCVmOption = vmOptionMethod.invoke(hotSpotDiagnosticMXBean, "UseG1GC");
info.useG1GC = (String) valueMethod.invoke(useG1GCVmOption);
} catch (Exception ignored) {
}
try {
Object initialHeapSizeVmOption =
vmOptionMethod.invoke(hotSpotDiagnosticMXBean, "InitialHeapSize");
info.configuredInitialHeapSize =
Long.parseLong((String) valueMethod.invoke(initialHeapSizeVmOption));
} catch (Exception ignored) {
}
try {
Object maxHeapSizeVmOption = vmOptionMethod.invoke(hotSpotDiagnosticMXBean, "MaxHeapSize");
info.configuredMaxHeapSize =
Long.parseLong((String) valueMethod.invoke(maxHeapSizeVmOption));
} catch (Exception ignored) {
}
} catch (Exception ignored) {
}
INSTANCE = info;
}