Examples with ScannerTimeoutException org.apache.hadoop.hbase.client.ScannerTimeoutException used on opensource projects

Example 1 with ScannerTimeoutException

use of org.apache.hadoop.hbase.client.ScannerTimeoutException in project cdap by caskdata.

the class HBaseTableTest method testScannerCache.

@Test
public void testScannerCache() throws Exception {
    String tableName = "scanCache";
    // note: it appears that HBase only enforces the scanner timeout after 10 seconds.
    // setting it to 3 seconds does not mean it will actually fsail after 3 sweconds.
    // therefore we have to cross the 10 seconds. here: 1200 times 10ms sleep.
    int numRows = 1200;
    DatasetAdmin admin = getTableAdmin(CONTEXT1, tableName);
    admin.create();
    try {
        // write some rows and commit
        Transaction tx1 = txClient.startShort();
        Table myTable1 = getTable(CONTEXT1, tableName);
        ((TransactionAware) myTable1).startTx(tx1);
        for (int i = 0; i < numRows; i++) {
            myTable1.put(new Put("" + i, "x", "y"));
        }
        txClient.canCommitOrThrow(tx1, ((TransactionAware) myTable1).getTxChanges());
        Assert.assertTrue(((TransactionAware) myTable1).commitTx());
        txClient.commitOrThrow(tx1);
        try {
            testScannerCache(numRows, tableName, null, null, null);
            Assert.fail("this should have failed with ScannerTimeoutException");
        } catch (Exception e) {
            // we expect a RuntimeException wrapping an HBase ScannerTimeoutException
            if (!(e.getCause() instanceof ScannerTimeoutException)) {
                throw e;
            }
        }
        // cache=100 as dataset property
        testScannerCache(numRows, tableName, "100", null, null);
        // cache=100 as dataset runtime argument
        testScannerCache(numRows, tableName, "1000", "100", null);
        // cache=100 as scan property
        testScannerCache(numRows, tableName, "5000", "1000", "100");
    } finally {
        admin.drop();
    }
}