Examples with MultiException org.apache.hadoop.io.retry.MultiException used on opensource projects

Example 1 with MultiException

use of org.apache.hadoop.io.retry.MultiException in project hadoop by apache.

the class TestRequestHedgingProxyProvider method testHedgingWhenBothFail.

@Test
public void testHedgingWhenBothFail() throws Exception {
    NamenodeProtocols badMock = Mockito.mock(NamenodeProtocols.class);
    Mockito.when(badMock.getStats()).thenThrow(new IOException("Bad mock !!"));
    NamenodeProtocols worseMock = Mockito.mock(NamenodeProtocols.class);
    Mockito.when(worseMock.getStats()).thenThrow(new IOException("Worse mock !!"));
    RequestHedgingProxyProvider<NamenodeProtocols> provider = new RequestHedgingProxyProvider<>(conf, nnUri, NamenodeProtocols.class, createFactory(badMock, worseMock));
    try {
        provider.getProxy().proxy.getStats();
        Assert.fail("Should fail since both namenodes throw IOException !!");
    } catch (Exception e) {
        Assert.assertTrue(e instanceof MultiException);
    }
    Mockito.verify(badMock).getStats();
    Mockito.verify(worseMock).getStats();
}

Example 2 with MultiException

use of org.apache.hadoop.io.retry.MultiException in project hadoop by apache.

the class TestRequestHedgingProxyProvider method testHedgingWhenConnectAndEOFException.

@Test
public void testHedgingWhenConnectAndEOFException() throws Exception {
    NamenodeProtocols active = Mockito.mock(NamenodeProtocols.class);
    Mockito.when(active.getStats()).thenThrow(new EOFException());
    NamenodeProtocols standby = Mockito.mock(NamenodeProtocols.class);
    Mockito.when(standby.getStats()).thenThrow(new ConnectException());
    RequestHedgingProxyProvider<NamenodeProtocols> provider = new RequestHedgingProxyProvider<>(conf, nnUri, NamenodeProtocols.class, createFactory(active, standby));
    try {
        provider.getProxy().proxy.getStats();
        Assert.fail("Should fail since both active and standby namenodes throw" + " Exceptions!");
    } catch (MultiException me) {
        for (Exception ex : me.getExceptions().values()) {
            if (!(ex instanceof ConnectException) && !(ex instanceof EOFException)) {
                Assert.fail("Unexpected Exception " + ex.getMessage());
            }
        }
    }
    Mockito.verify(active).getStats();
    Mockito.verify(standby).getStats();
}

Example 3 with MultiException

use of org.apache.hadoop.io.retry.MultiException in project hadoop by apache.

the class TestRequestHedgingProxyProvider method testHedgingWhenFileNotFoundException.

@Test
public void testHedgingWhenFileNotFoundException() throws Exception {
    NamenodeProtocols active = Mockito.mock(NamenodeProtocols.class);
    Mockito.when(active.getBlockLocations(Matchers.anyString(), Matchers.anyLong(), Matchers.anyLong())).thenThrow(new RemoteException("java.io.FileNotFoundException", "File does not exist!"));
    NamenodeProtocols standby = Mockito.mock(NamenodeProtocols.class);
    Mockito.when(standby.getBlockLocations(Matchers.anyString(), Matchers.anyLong(), Matchers.anyLong())).thenThrow(new RemoteException("org.apache.hadoop.ipc.StandbyException", "Standby NameNode"));
    RequestHedgingProxyProvider<NamenodeProtocols> provider = new RequestHedgingProxyProvider<>(conf, nnUri, NamenodeProtocols.class, createFactory(active, standby));
    try {
        provider.getProxy().proxy.getBlockLocations("/tmp/test.file", 0L, 20L);
        Assert.fail("Should fail since the active namenode throws" + " FileNotFoundException!");
    } catch (MultiException me) {
        for (Exception ex : me.getExceptions().values()) {
            Exception rEx = ((RemoteException) ex).unwrapRemoteException();
            if (rEx instanceof StandbyException) {
                continue;
            }
            Assert.assertTrue(rEx instanceof FileNotFoundException);
        }
    }
    Mockito.verify(active).getBlockLocations(Matchers.anyString(), Matchers.anyLong(), Matchers.anyLong());
    Mockito.verify(standby).getBlockLocations(Matchers.anyString(), Matchers.anyLong(), Matchers.anyLong());
}

Example 4 with MultiException

use of org.apache.hadoop.io.retry.MultiException in project hadoop by apache.

the class TestRequestHedgingProxyProvider method testHedgingWhenConnectException.

@Test
public void testHedgingWhenConnectException() throws Exception {
    NamenodeProtocols active = Mockito.mock(NamenodeProtocols.class);
    Mockito.when(active.getStats()).thenThrow(new ConnectException());
    NamenodeProtocols standby = Mockito.mock(NamenodeProtocols.class);
    Mockito.when(standby.getStats()).thenThrow(new RemoteException("org.apache.hadoop.ipc.StandbyException", "Standby NameNode"));
    RequestHedgingProxyProvider<NamenodeProtocols> provider = new RequestHedgingProxyProvider<>(conf, nnUri, NamenodeProtocols.class, createFactory(active, standby));
    try {
        provider.getProxy().proxy.getStats();
        Assert.fail("Should fail since the active namenode throws" + " ConnectException!");
    } catch (MultiException me) {
        for (Exception ex : me.getExceptions().values()) {
            if (ex instanceof RemoteException) {
                Exception rEx = ((RemoteException) ex).unwrapRemoteException();
                Assert.assertTrue("Unexpected RemoteException: " + rEx.getMessage(), rEx instanceof StandbyException);
            } else {
                Assert.assertTrue(ex instanceof ConnectException);
            }
        }
    }
    Mockito.verify(active).getStats();
    Mockito.verify(standby).getStats();
}