JvmPauseMonitor (Apache ZooKeeper

```
public class JvmPauseMonitor
extends Object
```
This code is originally from hadoop-common, see: https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/JvmPauseMonitor.java Class which sets up a simple thread which runs in a loop sleeping for a short interval of time. If the sleep takes significantly longer than its target time, it implies that the JVM or host machine has paused processing, which may cause other problems. If such a pause is detected, the thread logs a message.

Fields
Modifier and Type	Field and Description
`static long`	`INFO_THRESHOLD_DEFAULT`
`static String`	`INFO_THRESHOLD_KEY`
`protected long`	`infoThresholdMs` log INFO if we detect a pause longer than this threshold
`static String`	`JVM_PAUSE_MONITOR_FEATURE_SWITCH_KEY`
`static long`	`SLEEP_TIME_MS_DEFAULT`
`static String`	`SLEEP_TIME_MS_KEY`
`protected long`	`sleepTimeMs` The target sleep time
`static long`	`WARN_THRESHOLD_DEFAULT`
`static String`	`WARN_THRESHOLD_KEY`
`protected long`	`warnThresholdMs` log WARN if we detect a pause longer than this threshold

Constructors
Constructor and Description
`JvmPauseMonitor(QuorumPeerConfig config)`
`JvmPauseMonitor(ServerConfig config)`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`long`	`getNumGcInfoThresholdExceeded()`
`long`	`getNumGcWarnThresholdExceeded()`
`long`	`getTotalGcExtraSleepTime()`
`boolean`	`isStarted()`
`void`	`serviceStart()`
`void`	`serviceStop()`

public JvmPauseMonitor(QuorumPeerConfig config)

public JvmPauseMonitor(ServerConfig config)

public long getNumGcWarnThresholdExceeded()

public long getNumGcInfoThresholdExceeded()

public long getTotalGcExtraSleepTime()

Class JvmPauseMonitor