Java Code Examples for org.apache.hadoop.hdfs.server.namenode.NameNode#isInSafeMode()

The following examples show how to use org.apache.hadoop.hdfs.server.namenode.NameNode#isInSafeMode() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: RDFS   File: MiniDFSCluster.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * Returns true if the NameNode is running and is out of Safe Mode
 * or if waiting for safe mode is disabled.
 */
public boolean isNameNodeUp(int nnIndex) {
  NameNode nn = nameNodes[nnIndex].nameNode;
  if (nn == null) {
    return false;
  }
  try {
    long[] sizes = nn.getStats();
    boolean isUp = false;
    synchronized (this) {
      isUp = ((!nn.isInSafeMode() || !waitSafeMode) && sizes[0] != 0);
    }
    return isUp;
  } catch (IOException ie) {
    return false;
  }
}
 
Example 2
Source Project: hadoop   File: MiniDFSCluster.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Returns true if the NameNode is running and is out of Safe Mode
 * or if waiting for safe mode is disabled.
 */
public boolean isNameNodeUp(int nnIndex) {
  NameNode nameNode = nameNodes[nnIndex].nameNode;
  if (nameNode == null) {
    return false;
  }
  long[] sizes;
  sizes = NameNodeAdapter.getStats(nameNode.getNamesystem());
  boolean isUp = false;
  synchronized (this) {
    isUp = ((!nameNode.isInSafeMode() || !waitSafeMode) &&
        sizes[ClientProtocol.GET_STATS_CAPACITY_IDX] != 0);
  }
  return isUp;
}
 
Example 3
Source Project: big-c   File: MiniDFSCluster.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Returns true if the NameNode is running and is out of Safe Mode
 * or if waiting for safe mode is disabled.
 */
public boolean isNameNodeUp(int nnIndex) {
  NameNode nameNode = nameNodes[nnIndex].nameNode;
  if (nameNode == null) {
    return false;
  }
  long[] sizes;
  sizes = NameNodeAdapter.getStats(nameNode.getNamesystem());
  boolean isUp = false;
  synchronized (this) {
    isUp = ((!nameNode.isInSafeMode() || !waitSafeMode) &&
        sizes[ClientProtocol.GET_STATS_CAPACITY_IDX] != 0);
  }
  return isUp;
}