How to use

hasCorruptHeader

method

in

org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader$EditLogValidation

@Test
public void testValidateEditLogWithCorruptHeader() throws IOException {
 File testDir = new File(TEST_DIR, "testValidateEditLogWithCorruptHeader");
 SortedMap<Long, Long> offsetToTxId = Maps.newTreeMap();
 File logFile = prepareUnfinalizedTestEditLog(testDir, 2, offsetToTxId);
 RandomAccessFile rwf = new RandomAccessFile(logFile, "rw");
 try {
  rwf.seek(0);
  rwf.writeLong(42); // corrupt header
 } finally {
  rwf.close();
 }
 EditLogValidation validation = EditLogFileInputStream.validateEditLog(logFile);
 assertTrue(validation.hasCorruptHeader());
}

EditLogValidation validation =
  EditLogFileInputStream.validateEditLog(logFile);
assertTrue(!validation.hasCorruptHeader());
 assertEquals("Failed when corrupting txn opcode at " + txOffset,
   expectedEndTxId, validation.getEndTxId());
 assertTrue(!validation.hasCorruptHeader());
 assertEquals("Failed when corrupting txid " + txId + " txn opcode " +
  "at " + txOffset, expectedEndTxId, validation.getEndTxId());
 assertTrue(!validation.hasCorruptHeader());

@Test
public void testValidateEmptyEditLog() throws IOException {
 File testDir = new File(TEST_DIR, "testValidateEmptyEditLog");
 SortedMap<Long, Long> offsetToTxId = Maps.newTreeMap();
 File logFile = prepareUnfinalizedTestEditLog(testDir, 0, offsetToTxId);
 // Truncate the file so that there is nothing except the header and
 // layout flags section.
 truncateFile(logFile, 8);
 EditLogValidation validation =
   EditLogFileInputStream.validateEditLog(logFile);
 assertTrue(!validation.hasCorruptHeader());
 assertEquals(HdfsConstants.INVALID_TXID, validation.getEndTxId());
}

public void scanLog() throws IOException {
 EditLogValidation val = EditLogFileInputStream.scanEditLog(file);
 this.lastTxId = val.getEndTxId();
 this.hasCorruptHeader = val.hasCorruptHeader();
}

/** 
 * Find out where the edit log ends.
 * This will update the lastTxId of the EditLogFile or
 * mark it as corrupt if it is.
 */
public void validateLog() throws IOException {
 EditLogValidation val = EditLogFileInputStream.validateEditLog(file);
 this.lastTxId = val.getEndTxId();
 this.hasCorruptHeader = val.hasCorruptHeader();
}

public void scanLog() throws IOException {
 EditLogValidation val = EditLogFileInputStream.scanEditLog(file);
 this.lastTxId = val.getEndTxId();
 this.hasCorruptHeader = val.hasCorruptHeader();
}

/** 
 * Find out where the edit log ends.
 * This will update the lastTxId of the EditLogFile or
 * mark it as corrupt if it is.
 */
public void validateLog() throws IOException {
 EditLogValidation val = EditLogFileInputStream.validateEditLog(file);
 this.lastTxId = val.getEndTxId();
 this.hasCorruptHeader = val.hasCorruptHeader();
}

/** 
 * Find out where the edit log ends.
 * This will update the lastTxId of the EditLogFile or
 * mark it as corrupt if it is.
 * @param maxTxIdToScan Maximum Tx ID to try to scan.
 *                      The scan returns after reading this or a higher ID.
 *                      The file portion beyond this ID is potentially being
 *                      updated.
 * @param verifyVersion Whether the scan should verify the layout version
 */
public void scanLog(long maxTxIdToScan, boolean verifyVersion)
  throws IOException {
 EditLogValidation val = EditLogFileInputStream.scanEditLog(file,
   maxTxIdToScan, verifyVersion);
 this.lastTxId = val.getEndTxId();
 this.hasCorruptHeader = val.hasCorruptHeader();
}