Package org.apache.hadoop.mapred.TaskTracker

Examples of org.apache.hadoop.mapred.TaskTracker.ShuffleServerMetrics

160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
  protected ChannelFuture sendMapOutput(ChannelHandlerContext ctx, Channel ch,
      String jobId, String mapId, int reduce) throws IOException {
    LocalDirAllocator lDirAlloc = attributes.getLocalDirAllocator();
    FileSystem rfs = ((LocalFileSystem) attributes.getLocalFS()).getRaw();

    ShuffleServerMetrics shuffleMetrics = attributes.getShuffleServerMetrics();
    TaskTracker tracker = attributes.getTaskTracker();

    // Index file
    Path indexFileName = lDirAlloc.getLocalPathToRead(
        TaskTracker.getIntermediateOutputDir(jobId, mapId)
        + "/file.out.index", attributes.getJobConf());
    // Map-output file
    Path mapOutputFileName = lDirAlloc.getLocalPathToRead(
        TaskTracker.getIntermediateOutputDir(jobId, mapId)
        + "/file.out", attributes.getJobConf());

    /**
     * Read the index file to get the information about where
     * the map-output for the given reducer is available.
     */
    IndexRecord info = tracker.getIndexInformation(mapId, reduce,indexFileName);

    HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);

    //set the custom "from-map-task" http header to the map task from which
    //the map output data is being transferred
    response.setHeader(MRConstants.FROM_MAP_TASK, mapId);

    //set the custom "Raw-Map-Output-Length" http header to
    //the raw (decompressed) length
    response.setHeader(MRConstants.RAW_MAP_OUTPUT_LENGTH,
        Long.toString(info.rawLength));

    //set the custom "Map-Output-Length" http header to
    //the actual number of bytes being transferred
    response.setHeader(MRConstants.MAP_OUTPUT_LENGTH,
        Long.toString(info.partLength));

    //set the custom "for-reduce-task" http header to the reduce task number
    //for which this map output is being transferred
    response.setHeader(MRConstants.FOR_REDUCE_TASK, Integer.toString(reduce));

    ch.write(response);
    File spillfile = new File(mapOutputFileName.toString());
    RandomAccessFile spill;
    try {
      spill = new RandomAccessFile(spillfile, "r");
    } catch (FileNotFoundException e) {
      LOG.info(spillfile + " not found");
      return null;
    }
    final FileRegion partition = new DefaultFileRegion(
      spill.getChannel(), info.startOffset, info.partLength);
    ChannelFuture writeFuture = ch.write(partition);
    writeFuture.addListener(new ChanneFutureListenerMetrics(partition));
    shuffleMetrics.outputBytes(info.partLength); // optimistic
    LOG.info("Sending out " + info.partLength + " bytes for reduce: " +
             reduce + " from map: " + mapId + " given " +
             info.partLength + "/" + info.rawLength);
    return writeFuture;
  }
View Full Code Here
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
    factory.setAttribute("mapred.class",
        "org.apache.hadoop.metrics.spi.NoEmitMetricsContext");

    TaskTracker tt = new TaskTracker();
    tt.setConf(conf);
    ShuffleServerMetrics shuffleMetrics = tt.new ShuffleServerMetrics(conf);

    // first test with only MsgRegex set but doesn't match
    String exceptionMsgRegex = "Broken pipe";
    String exceptionStackRegex = null;
    IOException ie = new IOException("EOFException");
    testServlet.checkException(ie, exceptionMsgRegex, exceptionStackRegex,
        shuffleMetrics);

    MetricsContext context = factory.getContext("mapred");
    shuffleMetrics.doUpdates(context);
    Map<String, Collection<OutputRecord>> records = context.getAllRecords();
    Collection<OutputRecord> col = records.get("shuffleOutput");
    OutputRecord outputRecord = col.iterator().next();
    assertEquals(0, outputRecord.getMetric("shuffle_exceptions_caught")
        .intValue());

    // test with only MsgRegex set that does match
    ie = new IOException("Broken pipe");
    testServlet.checkException(ie, exceptionMsgRegex, exceptionStackRegex,
        shuffleMetrics);

    shuffleMetrics.doUpdates(context);
    assertEquals(1, outputRecord.getMetric("shuffle_exceptions_caught")
        .intValue());

    // test with neither set, make sure incremented
    exceptionStackRegex = null;
    exceptionMsgRegex = null;
    testServlet.checkException(ie, exceptionMsgRegex, exceptionStackRegex,
        shuffleMetrics);
    shuffleMetrics.doUpdates(context);
    assertEquals(2, outputRecord.getMetric("shuffle_exceptions_caught")
        .intValue());

    // test with only StackRegex set doesn't match
    exceptionStackRegex = ".*\\.doesnt\\$SelectSet\\.wakeup.*";
    exceptionMsgRegex = null;
    ie.setStackTrace(constructStackTrace());
    testServlet.checkException(ie, exceptionMsgRegex, exceptionStackRegex,
        shuffleMetrics);
    shuffleMetrics.doUpdates(context);
    assertEquals(2, outputRecord.getMetric("shuffle_exceptions_caught")
        .intValue());

    // test with only StackRegex set does match
    exceptionStackRegex = ".*\\.SelectorManager\\$SelectSet\\.wakeup.*";
    testServlet.checkException(ie, exceptionMsgRegex, exceptionStackRegex,
        shuffleMetrics);
    shuffleMetrics.doUpdates(context);
    assertEquals(3, outputRecord.getMetric("shuffle_exceptions_caught")
        .intValue());

    // test with both regex set and matches
    exceptionMsgRegex = "Broken pipe";
    ie.setStackTrace(constructStackTraceTwo());
    testServlet.checkException(ie, exceptionMsgRegex, exceptionStackRegex,
        shuffleMetrics);
    shuffleMetrics.doUpdates(context);
    assertEquals(4, outputRecord.getMetric("shuffle_exceptions_caught")
        .intValue());

    // test with both regex set and only msg matches
    exceptionStackRegex = ".*[1-9]+BOGUSREGEX";
    testServlet.checkException(ie, exceptionMsgRegex, exceptionStackRegex,
        shuffleMetrics);
    shuffleMetrics.doUpdates(context);
    assertEquals(4, outputRecord.getMetric("shuffle_exceptions_caught")
        .intValue());

    // test with both regex set and only stack matches
    exceptionStackRegex = ".*\\.SelectorManager\\$SelectSet\\.wakeup.*";
    exceptionMsgRegex = "EOFException";
    testServlet.checkException(ie, exceptionMsgRegex, exceptionStackRegex,
        shuffleMetrics);
    shuffleMetrics.doUpdates(context);
    assertEquals(4, outputRecord.getMetric("shuffle_exceptions_caught")
        .intValue());
  }
View Full Code Here
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
  }

  protected ChannelFuture sendMapOutput(ChannelHandlerContext ctx, Channel ch,
      String jobId, String mapId, int reduce) throws IOException {
    LocalDirAllocator lDirAlloc = attributes.getLocalDirAllocator();
    ShuffleServerMetrics shuffleMetrics = attributes.getShuffleServerMetrics();
    TaskTracker tracker = attributes.getTaskTracker();
    boolean found = true;

    Path indexFileName = null;
    Path mapOutputFileName = null;
    try {
    // Index file
    indexFileName = lDirAlloc.getLocalPathToRead(
        TaskTracker.getIntermediateOutputDir(jobId, mapId)
        + "/file.out.index", attributes.getJobConf());
    // Map-output file
    mapOutputFileName = lDirAlloc.getLocalPathToRead(
        TaskTracker.getIntermediateOutputDir(jobId, mapId)
        + "/file.out", attributes.getJobConf());
    } catch (DiskChecker.DiskErrorException e) {
      LOG.error("sendMapOutput: Failed to retrieve index or map output " +
          "file, will send ShuffleHeader noting the file can't be found.",
          e);
      found = false;
    }

    /**
     * Read the index file to get the information about where
     * the map-output for the given reducer is available.
     */
    IndexRecord info = null;
    try {
      info = tracker.getIndexInformation(mapId, reduce, indexFileName);
    } catch (IOException e) {
      LOG.error("sendMapOutput: Failed to get the index information, " +
          "will send ShuffleHeader noting that the file can't be found.", e);
      found = false;
      info = new IndexRecord(-1, 0, 0);
    }

    RandomAccessFile spill = null;
    if (mapOutputFileName != null) {
      File spillfile = new File(mapOutputFileName.toString());
      try {
        spill = new RandomAccessFile(spillfile, "r");
      } catch (FileNotFoundException e) {
        LOG.error("sendMapOutput: " + spillfile + " not found, " +
            "will send ShuffleHeader noting that the file can't be found.", e);
        found = false;
      }
    }

    final ShuffleHeader header =
        new ShuffleHeader(mapId, info.partLength, info.rawLength, reduce,
            found);
    final DataOutputBuffer dob = new DataOutputBuffer();
    header.write(dob);
    ChannelFuture writeFuture =
        ch.write(wrappedBuffer(dob.getData(), 0, dob.getLength()));
    // Exit early if we didn't find the spill file.
    if (found == false || spill == null) {
      attributes.getTaskTracker().mapOutputLost(
          TaskAttemptID.forName(mapId),
          "sendMapOutput: Couldn't get mapId = " + mapId + ", reduce " +
              reduce);
      return writeFuture;
    }

    final FileRegion partition = new DefaultFileRegion(
      spill.getChannel(), info.startOffset, info.partLength);
    writeFuture = ch.write(partition);
    writeFuture.addListener(new ChanneFutureListenerMetrics(partition));
    shuffleMetrics.outputBytes(info.partLength); // optimistic
    LOG.info("Sending out " + info.partLength + " bytes for reduce: " +
             reduce + " from map: " + mapId + " given " +
             info.partLength + "/" + info.rawLength);
    return writeFuture;
  }
View Full Code Here
TOP

Related Classes of org.apache.hadoop.mapred.TaskTracker.ShuffleServerMetrics

  • org.apache.hadoop.mapred.ShuffleHandler
  • org.apache.hadoop.mapred.TestShuffleExceptionCount
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.