private int loadRMApp(RMState rmState, LeveldbIterator iter, String appIdStr, byte[] appData)
throws IOException {
ApplicationStateData appState = createApplicationState(appIdStr, appData);
ApplicationId appId = appState.getApplicationSubmissionContext().getApplicationId();
rmState.appState.put(appId, appState);
String attemptNodePrefix = getApplicationNodeKey(appId) + SEPARATOR;
while (iter.hasNext()) {
Entry<byte[], byte[]> entry = iter.peekNext();
String key = asString(entry.getKey());
if (!key.startsWith(attemptNodePrefix)) {
break;
}
String attemptId = key.substring(attemptNodePrefix.length());
if (attemptId.startsWith(ApplicationAttemptId.appAttemptIdStrPrefix)) {
ApplicationAttemptStateData attemptState = createAttemptState(attemptId, entry.getValue());
appState.attempts.put(attemptState.getAttemptId(), attemptState);
} else {
LOG.warn("Ignoring unknown application key: " + key);
}
iter.next();
}
int numAttempts = appState.attempts.size();
if (LOG.isDebugEnabled()) {
LOG.debug("Loaded application " + appId + " with " + numAttempts + " attempts");
}
return numAttempts;
}
protected void recoverApplication(ApplicationStateData appState, RMState rmState)
throws Exception {
ApplicationSubmissionContext appContext = appState.getApplicationSubmissionContext();
ApplicationId appId = appContext.getApplicationId();
// create and recover app.
RMAppImpl application =
createAndPopulateNewRMApp(appContext, appState.getSubmitTime(), appState.getUser(), true);
application.handle(new RMAppRecoverEvent(appId, rmState));
}
@Override
protected void removeApplicationStateInternal(ApplicationStateData appState) throws IOException {
ApplicationId appId = appState.getApplicationSubmissionContext().getApplicationId();
String appKey = getApplicationNodeKey(appId);
try {
WriteBatch batch = db.createWriteBatch();
try {
batch.delete(bytes(appKey));
for (ApplicationAttemptId attemptId : appState.attempts.keySet()) {
String attemptKey = getApplicationAttemptNodeKey(appKey, attemptId);
batch.delete(bytes(attemptKey));
}
if (LOG.isDebugEnabled()) {
LOG.debug(
"Removing state for app "
+ appId
+ " and "
+ appState.attempts.size()
+ " attempts"
+ " at "
+ appKey);
}
db.write(batch);
} finally {
batch.close();
}
} catch (DBException e) {
throw new IOException(e);
}
}
@Override
public synchronized void removeApplicationStateInternal(ApplicationStateData appState)
throws Exception {
ApplicationId appId = appState.getApplicationSubmissionContext().getApplicationId();
Path nodeRemovePath = getAppDir(rmAppRoot, appId);
LOG.info("Removing info for app: " + appId + " at: " + nodeRemovePath);
deleteFileWithRetries(nodeRemovePath);
}
@Override
protected void storeApplicationStateInternal(
ApplicationId appId, ApplicationStateData appStateData) throws IOException {
String key = getApplicationNodeKey(appId);
if (LOG.isDebugEnabled()) {
LOG.debug("Storing state for app " + appId + " at " + key);
}
try {
db.put(bytes(key), appStateData.getProto().toByteArray());
} catch (DBException e) {
throw new IOException(e);
}
}
@Override
public synchronized void updateApplicationStateInternal(
ApplicationId appId, ApplicationStateData appStateDataPB) throws Exception {
Path appDirPath = getAppDir(rmAppRoot, appId);
Path nodeCreatePath = getNodePath(appDirPath, appId.toString());
LOG.info("Updating info for app: " + appId + " at: " + nodeCreatePath);
byte[] appStateData = appStateDataPB.getProto().toByteArray();
try {
// currently throw all exceptions. May need to respond differently for HA
// based on whether we have lost the right to write to FS
updateFile(nodeCreatePath, appStateData, true);
} catch (Exception e) {
LOG.info("Error updating info for app: " + appId, e);
throw e;
}
}