Examples of org.apache.hadoop.hbase.exceptions.UnknownScannerException

Package org.apache.hadoop.hbase.exceptions

Examples of org.apache.hadoop.hbase.exceptions.UnknownScannerException

org.apache.hadoop.hbase.exceptions.UnknownScannerException
Thrown if a region server is passed an unknown scanner id. Usually means the client has take too long between checkins and so the scanner lease on the serverside has expired OR the serverside is closing down and has cancelled all leases.

          rows = request.getNumberOfRows();
        }
        if (request.hasScannerId()) {
          rsh = scanners.get(scannerName);
          if (rsh == null) {
            throw new UnknownScannerException(
              "Name: " + scannerName + ", already closed?");
          }
          scanner = rsh.s;
          region = getRegion(scanner.getRegionInfo().getRegionName());
        } else {

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    @Override
    public synchronized boolean next(List<KeyValue> outResults, int limit,
        String metric) throws IOException {
      if (this.filterClosed) {
        throw new UnknownScannerException("Scanner was closed (timed out?) " +
            "after we renewed it. Could be caused by a very slow scanner " +
            "or a lengthy garbage collection");
      }
      startRegionOperation();
      readRequestsCount.increment();

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          doReturn("bogus".getBytes()).when(scan).getStartRow(); // avoid npe
          ResultScanner scanner = mock(ResultScanner.class);


          invocation.callRealMethod(); // simulate UnknownScannerException
          doThrow(
              new UnknownScannerException("Injected simulated TimeoutException"))
              .when(scanner).next();
          return scanner;
        }


        // otherwise return the real scanner.

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Related Classes of org.apache.hadoop.hbase.exceptions.UnknownScannerException

org.apache.hadoop.hbase.mapred.TestTableInputFormat

org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl

org.apache.hadoop.hbase.regionserver.HRegionServer

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