import org.apache.hadoop.hdfs.server.blockmanagement.CacheReplicationMonitor; //导入依赖的package包/类
public void startMonitorThread() {
  crmLock.lock();
  try {
    if (this.monitor == null) {
      this.monitor = new CacheReplicationMonitor(namesystem, this,
          scanIntervalMs, crmLock);
      this.monitor.start();
    }
  } finally {
    crmLock.unlock();
  }
}
 

import org.apache.hadoop.hdfs.server.blockmanagement.CacheReplicationMonitor; //导入依赖的package包/类
public void stopMonitorThread() {
  crmLock.lock();
  try {
    if (this.monitor != null) {
      CacheReplicationMonitor prevMonitor = this.monitor;
      this.monitor = null;
      IOUtils.closeQuietly(prevMonitor);
    }
  } finally {
    crmLock.unlock();
  }
}
 

import org.apache.hadoop.hdfs.server.blockmanagement.CacheReplicationMonitor; //导入依赖的package包/类
public static void enableHdfsCachingTracing() {
  LogManager.getLogger(CacheReplicationMonitor.class.getName()).setLevel(
      Level.TRACE);
  LogManager.getLogger(CacheManager.class.getName()).setLevel(
      Level.TRACE);
  LogManager.getLogger(FsDatasetCache.class.getName()).setLevel(
      Level.TRACE);
}