Java Code Examples for org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore#checkVersion()

The following examples show how to use org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore#checkVersion() . 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: hadoop   File: ResourceManager.java    License: Apache License 2.0 5 votes vote down vote up
@Override
protected void serviceStart() throws Exception {
  RMStateStore rmStore = rmContext.getStateStore();
  // The state store needs to start irrespective of recoveryEnabled as apps
  // need events to move to further states.
  rmStore.start();

  if(recoveryEnabled) {
    try {
      LOG.info("Recovery started");
      rmStore.checkVersion();
      if (rmContext.isWorkPreservingRecoveryEnabled()) {
        rmContext.setEpoch(rmStore.getAndIncrementEpoch());
      }
      RMState state = rmStore.loadState();
      recover(state);
      LOG.info("Recovery ended");
    } catch (Exception e) {
      // the Exception from loadState() needs to be handled for
      // HA and we need to give up master status if we got fenced
      LOG.error("Failed to load/recover state", e);
      throw e;
    }
  }

  super.serviceStart();
}
 
Example 2
Source Project: big-c   File: ResourceManager.java    License: Apache License 2.0 5 votes vote down vote up
@Override
protected void serviceStart() throws Exception {
  RMStateStore rmStore = rmContext.getStateStore();
  // The state store needs to start irrespective of recoveryEnabled as apps
  // need events to move to further states.
  rmStore.start();

  if(recoveryEnabled) {
    try {
      LOG.info("Recovery started");
      rmStore.checkVersion();
      if (rmContext.isWorkPreservingRecoveryEnabled()) {
        rmContext.setEpoch(rmStore.getAndIncrementEpoch());
      }
      RMState state = rmStore.loadState();
      recover(state);
      LOG.info("Recovery ended");
    } catch (Exception e) {
      // the Exception from loadState() needs to be handled for
      // HA and we need to give up master status if we got fenced
      LOG.error("Failed to load/recover state", e);
      throw e;
    }
  }

  super.serviceStart();
}