Package org.apache.hadoop.hdfs.server.namenode

Examples of org.apache.hadoop.hdfs.server.namenode.EditLogOutputStream

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    writeSegment(cluster, qjm, 1, 3, true);
    waitForAllPendingCalls(qjm.getLoggerSetForTests());
    cluster.getJournalNode(nodeMissingSegment).stopAndJoin(0);
   
    // Open segment on 2/3 nodes
    EditLogOutputStream stm = qjm.startLogSegment(4,
        NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
    try {
      waitForAllPendingCalls(qjm.getLoggerSetForTests());
     
      // Write transactions to only 1/3 nodes
      failLoggerAtTxn(spies.get(nodeWithEmptySegment), 4);
      try {
        writeTxns(stm, 4, 1);
        fail("Did not fail even though 2/3 failed");
      } catch (QuorumException qe) {
        GenericTestUtils.assertExceptionContains("mock failure", qe);
      }
    } finally {
      stm.abort();
    }
   
    // Bring back the down JN.
    cluster.restartJournalNode(nodeMissingSegment);
   
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    // Logger 1: fail at txn id 4
    failLoggerAtTxn(spies.get(1), 4L);
   
    writeSegment(cluster, qjm, 1, 3, true);
    EditLogOutputStream stm = qjm.startLogSegment(4,
        NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
    try {
      writeTxns(stm, 4, 1);
      fail("Did not fail to write");
    } catch (QuorumException qe) {
      // Should fail, because logger 1 had an injected fault and
      // logger 0 should detect writer out of sync
      GenericTestUtils.assertExceptionContains("Writer out of sync",
          qe);
    } finally {
      stm.abort();
      qjm.close();
    }
   
    // State:
    // Logger 0: 1-3 in-progress (since it missed finalize)
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   * - JN2: edits 1-5 in progress
   *
   * None of the loggers have any associated paxos info.
   */
  private void setupLoggers345() throws Exception {
    EditLogOutputStream stm = qjm.startLogSegment(1,
        NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
   
    failLoggerAtTxn(spies.get(0), 4);
    failLoggerAtTxn(spies.get(1), 5);
   
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    Assert.assertFalse("Report should be plain text", report.contains("<"));
  }

  @Test
  public void testWriteEdits() throws Exception {
    EditLogOutputStream stm = createLogSegment();
    writeOp(stm, 1);
    writeOp(stm, 2);
   
    stm.setReadyToFlush();
    writeOp(stm, 3);
   
    // The flush should log txn 1-2
    futureReturns(null).when(spyLoggers.get(0)).sendEdits(
        anyLong(), eq(1L), eq(2), Mockito.<byte[]>any());
    futureReturns(null).when(spyLoggers.get(1)).sendEdits(
        anyLong(), eq(1L), eq(2), Mockito.<byte[]>any());
    futureReturns(null).when(spyLoggers.get(2)).sendEdits(
        anyLong(), eq(1L), eq(2), Mockito.<byte[]>any());
    stm.flush();

    // Another flush should now log txn #3
    stm.setReadyToFlush();
    futureReturns(null).when(spyLoggers.get(0)).sendEdits(
        anyLong(), eq(3L), eq(1), Mockito.<byte[]>any());
    futureReturns(null).when(spyLoggers.get(1)).sendEdits(
        anyLong(), eq(3L), eq(1), Mockito.<byte[]>any());
    futureReturns(null).when(spyLoggers.get(2)).sendEdits(
        anyLong(), eq(3L), eq(1), Mockito.<byte[]>any());
    stm.flush();
  }
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    stm.flush();
  }
 
  @Test
  public void testWriteEditsOneSlow() throws Exception {
    EditLogOutputStream stm = createLogSegment();
    writeOp(stm, 1);
    stm.setReadyToFlush();
   
    // Make the first two logs respond immediately
    futureReturns(null).when(spyLoggers.get(0)).sendEdits(
        anyLong(), eq(1L), eq(1), Mockito.<byte[]>any());
    futureReturns(null).when(spyLoggers.get(1)).sendEdits(
        anyLong(), eq(1L), eq(1), Mockito.<byte[]>any());
   
    // And the third log not respond
    SettableFuture<Void> slowLog = SettableFuture.<Void>create();
    Mockito.doReturn(slowLog).when(spyLoggers.get(2)).sendEdits(
        anyLong(), eq(1L), eq(1), Mockito.<byte[]>any());
    stm.flush();
   
    Mockito.verify(spyLoggers.get(0)).setCommittedTxId(1L);
  }
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        Mockito.eq(NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION));
    futureReturns(null).when(spyLoggers.get(1)).startLogSegment(Mockito.anyLong(),
        Mockito.eq(NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION));
    futureReturns(null).when(spyLoggers.get(2)).startLogSegment(Mockito.anyLong(),
        Mockito.eq(NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION));
    EditLogOutputStream stm = qjm.startLogSegment(1,
        NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
    return stm;
  }
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      QuorumJournalManager qjm, long txid, int numTxns, Holder<Throwable> thrown) {
   
    long firstTxId = txid;
    long lastAcked = txid - 1;
    try {
      EditLogOutputStream stm = qjm.startLogSegment(txid);
     
      for (int i = 0; i < numTxns; i++) {
        QJMTestUtil.writeTxns(stm, txid++, 1);
        lastAcked++;
      }
     
      stm.close();
      qjm.finalizeLogSegment(firstTxId, lastAcked);
    } catch (Throwable t) {
      thrown.held = t;
    }
    return lastAcked;
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  @Test
  public void testCrashAtBeginningOfSegment() throws Exception {
    writeSegment(cluster, qjm, 1, 3, true);
    waitForAllPendingCalls(qjm.getLoggerSetForTests());
   
    EditLogOutputStream stm = qjm.startLogSegment(4);
    try {
      waitForAllPendingCalls(qjm.getLoggerSetForTests());
    } finally {
      stm.abort();
    }
   
   
    // Make a new QJM
    qjm = new QuorumJournalManager(
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    writeSegment(cluster, qjm, 1, 3, true);
    waitForAllPendingCalls(qjm.getLoggerSetForTests());
    cluster.getJournalNode(nodeMissingSegment).stopAndJoin(0);
   
    // Open segment on 2/3 nodes
    EditLogOutputStream stm = qjm.startLogSegment(4);
    try {
      waitForAllPendingCalls(qjm.getLoggerSetForTests());
     
      // Write transactions to only 1/3 nodes
      failLoggerAtTxn(spies.get(nodeWithEmptySegment), 4);
      try {
        writeTxns(stm, 4, 1);
        fail("Did not fail even though 2/3 failed");
      } catch (QuorumException qe) {
        GenericTestUtils.assertExceptionContains("mock failure", qe);
      }
    } finally {
      stm.abort();
    }
   
    // Bring back the down JN.
    cluster.restartJournalNode(nodeMissingSegment);
   
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    // Logger 1: fail at txn id 4
    failLoggerAtTxn(spies.get(1), 4L);
   
    writeSegment(cluster, qjm, 1, 3, true);
    EditLogOutputStream stm = qjm.startLogSegment(4);
    try {
      writeTxns(stm, 4, 1);
      fail("Did not fail to write");
    } catch (QuorumException qe) {
      // Should fail, because logger 1 had an injected fault and
      // logger 0 should detect writer out of sync
      GenericTestUtils.assertExceptionContains("Writer out of sync",
          qe);
    } finally {
      stm.abort();
      qjm.close();
    }
   
    // State:
    // Logger 0: 1-3 in-progress (since it missed finalize)
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