public void testScannerReseekDoesntNPE() throws Exception {
List<KeyValueScanner> scanners = scanFixture(kvs);
StoreScanner scan =
new StoreScanner(new Scan(), scanInfo, scanType, getCols("a", "d"), scanners);
// Previously a updateReaders twice in a row would cause an NPE. In test this would also
// normally cause an NPE because scan.store is null. So as long as we get through these
// two calls we are good and the bug was quashed.
scan.updateReaders();
scan.updateReaders();
scan.peek();
}
public void testWideScanBatching() throws IOException {
final int batch = 256;
try {
this.r = createNewHRegion(TESTTABLEDESC, null, null);
int inserted = addWideContent(this.r);
List<Cell> results = new ArrayList<Cell>();
Scan scan = new Scan();
scan.addFamily(A);
scan.addFamily(B);
scan.addFamily(C);
scan.setMaxVersions(100);
scan.setBatch(batch);
InternalScanner s = r.getScanner(scan);
int total = 0;
int i = 0;
boolean more;
do {
more = s.next(results);
i++;
LOG.info("iteration #" + i + ", results.size=" + results.size());
// assert that the result set is no larger
assertTrue(results.size() <= batch);
total += results.size();
if (results.size() > 0) {
// assert that all results are from the same row
byte[] row = CellUtil.cloneRow(results.get(0));
for (Cell kv : results) {
assertTrue(Bytes.equals(row, CellUtil.cloneRow(kv)));
}
}
results.clear();
// trigger ChangedReadersObservers
Iterator<KeyValueScanner> scanners =
((HRegion.RegionScannerImpl) s).storeHeap.getHeap().iterator();
while (scanners.hasNext()) {
StoreScanner ss = (StoreScanner) scanners.next();
ss.updateReaders();
}
} while (more);
// assert that the scanner returned all values
LOG.info("inserted " + inserted + ", scanned " + total);
assertEquals(total, inserted);
s.close();
} finally {
HRegion.closeHRegion(this.r);
}
}