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https://issues.apache.org/jira/browse/STORM-1199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15057743#comment-15057743
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ASF GitHub Bot commented on STORM-1199:
---------------------------------------
Github user satishd commented on a diff in the pull request:
https://github.com/apache/storm/pull/936#discussion_r47616335
--- Diff:
external/storm-hdfs/src/main/java/org/apache/storm/hdfs/spout/HdfsSpout.java ---
@@ -0,0 +1,654 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ * <p/>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p/>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.storm.hdfs.spout;
+
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import backtype.storm.Config;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.storm.hdfs.common.HdfsUtils;
+import org.apache.storm.hdfs.common.security.HdfsSecurityUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import backtype.storm.spout.SpoutOutputCollector;
+import backtype.storm.task.TopologyContext;
+import backtype.storm.topology.OutputFieldsDeclarer;
+import backtype.storm.topology.base.BaseRichSpout;
+import backtype.storm.tuple.Fields;
+
+public class HdfsSpout extends BaseRichSpout {
+
+ private static final Logger LOG =
LoggerFactory.getLogger(HdfsSpout.class);
+
+ private Path sourceDirPath;
+ private Path archiveDirPath;
+ private Path badFilesDirPath;
+ private Path lockDirPath;
+
+ private int commitFrequencyCount = Configs.DEFAULT_COMMIT_FREQ_COUNT;
+ private int commitFrequencySec = Configs.DEFAULT_COMMIT_FREQ_SEC;
+ private int maxDuplicates = Configs.DEFAULT_MAX_DUPLICATES;
+ private int lockTimeoutSec = Configs.DEFAULT_LOCK_TIMEOUT;
+ private boolean clocksInSync = true;
+
+ private ProgressTracker tracker = new ProgressTracker();
+
+ private FileSystem hdfs;
+ private FileReader reader;
+
+ private SpoutOutputCollector collector;
+ HashMap<MessageId, List<Object> > inflight = new HashMap<>();
+ LinkedBlockingQueue<HdfsUtils.Pair<MessageId, List<Object>>> retryList =
new LinkedBlockingQueue<>();
+
+ private String inprogress_suffix = ".inprogress";
+ private String ignoreSuffix = ".ignore";
+
+ private Configuration hdfsConfig;
+ private String readerType;
+
+ private Map conf = null;
+ private FileLock lock;
+ private String spoutId = null;
+
+ HdfsUtils.Pair<Path,FileLock.LogEntry> lastExpiredLock = null;
+ private long lastExpiredLockTime = 0;
+
+ private long tupleCounter = 0;
+ private boolean ackEnabled = false;
+ private int acksSinceLastCommit = 0 ;
+ private final AtomicBoolean commitTimeElapsed = new AtomicBoolean(false);
+ private final Timer commitTimer = new Timer();
+ private boolean fileReadCompletely = false;
+
+ private String configKey = Configs.DEFAULT_HDFS_CONFIG_KEY; // key for
hdfs kerberos configs
+
+ public HdfsSpout() {
+ }
+
+ public Path getLockDirPath() {
+ return lockDirPath;
+ }
+
+ public SpoutOutputCollector getCollector() {
+ return collector;
+ }
+
+ public HdfsSpout withConfigKey(String configKey){
+ this.configKey = configKey;
+ return this;
+ }
+
+ public void nextTuple() {
+ LOG.debug("Next Tuple");
+ // 1) First re-emit any previously failed tuples (from retryList)
+ if (!retryList.isEmpty()) {
+ LOG.debug("Sending from retry list");
+ HdfsUtils.Pair<MessageId, List<Object>> pair = retryList.remove();
+ emitData(pair.getValue(), pair.getKey());
+ return;
+ }
+
+ if( ackEnabled && tracker.size()>=maxDuplicates ) {
+ LOG.warn("Waiting for more ACKs before generating new tuples. " +
+ "Progress tracker size has reached limit {}"
+ , maxDuplicates);
+ // Don't emit anything .. allow configured spout wait strategy to
kick in
+ return;
+ }
+
+ // 2) If no failed tuples, then send tuples from hdfs
+ while (true) {
+ try {
+ // 3) Select a new file if one is not open already
+ if (reader == null) {
+ reader = pickNextFile();
+ if (reader == null) {
+ LOG.info("Currently no new files to process under : " +
sourceDirPath);
+ return;
+ }
+ }
+
+ // 4) Read record from file, emit to collector and record progress
+ List<Object> tuple = reader.next();
+ if (tuple != null) {
+ fileReadCompletely= false;
+ ++tupleCounter;
+ MessageId msgId = new MessageId(tupleCounter,
reader.getFilePath(), reader.getFileOffset());
+ emitData(tuple, msgId);
+
+ if(!ackEnabled) {
+ ++acksSinceLastCommit; // assume message is immediately acked
in non-ack mode
+ commitProgress(reader.getFileOffset());
+ } else {
+ commitProgress(tracker.getCommitPosition());
+ }
+ return;
+ } else {
+ fileReadCompletely = true;
+ if(!ackEnabled) {
+ markFileAsDone(reader.getFilePath());
+ }
--- End diff --
if ackEnabled is true then fileReadCompletely is set as false on line
no:142 after reading the first record from the next file. This makes the
earlier file is always opened and it is not moved to archive dir. ack() method
has code to markFIleAsDone() when fileReadCompletely is true but it may not get
triggered because fileReadCompletely is set as false.
> Create HDFS Spout
> -----------------
>
> Key: STORM-1199
> URL: https://issues.apache.org/jira/browse/STORM-1199
> Project: Apache Storm
> Issue Type: New Feature
> Reporter: Roshan Naik
> Assignee: Roshan Naik
> Attachments: HDFSSpoutforStorm v2.pdf, HDFSSpoutforStorm.pdf,
> hdfs-spout.1.patch
>
>
> Create an HDFS spout so that Storm can suck in data from files in a HDFS
> directory
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