private void handleAppSubmitEvent(DelegationTokenRenewerAppSubmitEvent evt) throws IOException, InterruptedException { ApplicationId applicationId = evt.getApplicationId(); Credentials ts = evt.getCredentials(); boolean shouldCancelAtEnd = evt.shouldCancelAtEnd(); if (ts == null) { return; // nothing to add } if (LOG.isDebugEnabled()) { LOG.debug("Registering tokens for renewal for:" + " appId = " + applicationId); } Collection<Token<?>> tokens = ts.getAllTokens(); long now = System.currentTimeMillis(); // find tokens for renewal, but don't add timers until we know // all renewable tokens are valid // At RM restart it is safe to assume that all the previously added tokens // are valid appTokens.put( applicationId, Collections.synchronizedSet(new HashSet<DelegationTokenToRenew>())); Set<DelegationTokenToRenew> tokenList = new HashSet<DelegationTokenToRenew>(); boolean hasHdfsToken = false; for (Token<?> token : tokens) { if (token.isManaged()) { tokenList.add( new DelegationTokenToRenew( applicationId, token, getConfig(), now, shouldCancelAtEnd, evt.getUser())); if (token.getKind().equals(new Text("HDFS_DELEGATION_TOKEN"))) { LOG.info(applicationId + " found existing hdfs token " + token); hasHdfsToken = true; } } } if (!tokenList.isEmpty()) { // Renewing token and adding it to timer calls are separated purposefully // If user provides incorrect token then it should not be added for // renewal. for (DelegationTokenToRenew dtr : tokenList) { try { renewToken(dtr); } catch (IOException ioe) { throw new IOException("Failed to renew token: " + dtr.token, ioe); } } for (DelegationTokenToRenew dtr : tokenList) { appTokens.get(applicationId).add(dtr); setTimerForTokenRenewal(dtr); } } if (!hasHdfsToken) { requestNewHdfsDelegationToken(applicationId, evt.getUser(), shouldCancelAtEnd); } }