Package org.apache.hadoop.fs

Examples of org.apache.hadoop.fs.ChecksumException

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      checksum.reset();
      int dLen = Math.min(dLeft, chunkSize);
      checksum.update(buf, dOff, dLen);
      if (!checksum.compare(buf, cOff)) {
        long failedPos = offset + datalen - dLeft;
        throw new ChecksumException("Checksum failed at " + failedPos,
            failedPos);
      }
      dLeft -= dLen;
      dOff += dLen;
      cOff += checksumSize;
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      if (crc != null) {
        crc.reset();
        CheckedInputStream chk = new CheckedInputStream(in, crc);
        IOUtils.readFully(chk, buf.array(), 0, size);
        if (chk.getChecksum().getValue() != in.readLong()) {
          throw new ChecksumException("Checksum error reading spill index: " +
                                indexFileName, -1);
        }
      } else {
        IOUtils.readFully(in, buf.array(), 0, size);
      }
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    }
   
    int bytesRead = in.read(b, off, len);

    if (bytesRead < 0) {
      throw new ChecksumException("Checksum Error", 0);
    }
   
    sum.update(b,off,bytesRead);

    currentOffset += bytesRead;

    if (disableChecksumValidation) {
      return bytesRead;
    }
   
    if (currentOffset == dataLength) {
      // The last four bytes are checksum. Strip them and verify
      csum = new byte[checksumSize];
      IOUtils.readFully(in, csum, 0, checksumSize);
      if (!sum.compare(csum, 0)) {
        throw new ChecksumException("Checksum Error", 0);
      }
    }
    return bytesRead;
  }
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      if (crc != null) {
        crc.reset();
        CheckedInputStream chk = new CheckedInputStream(in, crc);
        IOUtils.readFully(chk, buf.array(), 0, size);
        if (chk.getChecksum().getValue() != in.readLong()) {
          throw new ChecksumException("Checksum error reading spill index: " +
                                indexFileName, -1);
        }
      } else {
        IOUtils.readFully(in, buf.array(), 0, size);
      }
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        for (int i=0; i<numChunks; i++) {
          checksum.reset();
          int dLen = Math.min(dLeft, bytesPerChecksum);
          checksum.update(buf, dOff, dLen);
          if (!checksum.compare(buf, cOff)) {
            throw new ChecksumException("Checksum failed at " +
                                        (offset + len - dLeft), len);
          }
          dLeft -= dLen;
          dOff += dLen;
          cOff += checksumSize;
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      if (crc != null) {
        crc.reset();
        CheckedInputStream chk = new CheckedInputStream(in, crc);
        IOUtils.readFully(chk, buf.array(), 0, size);
        if (chk.getChecksum().getValue() != in.readLong()) {
          throw new ChecksumException("Checksum error reading spill index: " +
                                indexFileName, -1);
        }
      } else {
        IOUtils.readFully(in, buf.array(), 0, size);
      }
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          (sum[1] << 16 & 0xff0000) |
          (sum[2] << 8 & 0xff00) |
          sum[3] & 0xff;
        if (calculated != stored) {
          long errPos = basePos + data.position() - startDataPos - n;
          throw new ChecksumException(
              "Checksum error: "+ fileName + " at "+ errPos +
              " exp: " + stored + " got: " + calculated, errPos);
        }
      }
    } finally {
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        (checksums[checksumsOff + 2] << 8 & 0xff00) |
        checksums[checksumsOff + 3] & 0xff;
      checksumsOff += 4;
      if (calculated != stored) {
        long errPos = basePos + dataPos - n;
        throw new ChecksumException(
            "Checksum error: "+ fileName + " at "+ errPos +
            " exp: " + stored + " got: " + calculated, errPos);
      }
    }
  }
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          (sum[1] << 16 & 0xff0000) |
          (sum[2] << 8 & 0xff00) |
          sum[3] & 0xff;
        if (calculated != stored) {
          long errPos = basePos + data.position() - startDataPos - n;
          throw new ChecksumException(
              "Checksum error: "+ fileName + " at "+ errPos +
              " exp: " + stored + " got: " + calculated, errPos);
        }
      }
    } finally {
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        (checksums[checksumsOff + 2] << 8 & 0xff00) |
        checksums[checksumsOff + 3] & 0xff;
      checksumsOff += 4;
      if (calculated != stored) {
        long errPos = basePos + dataPos - n;
        throw new ChecksumException(
            "Checksum error: "+ fileName + " at "+ errPos +
            " exp: " + stored + " got: " + calculated, errPos);
      }
    }
  }
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