/**
* Cases can occur where we create a segment but crash before we even have the chance to write the
* START_SEGMENT op. If this occurs we should warn, but load as normal
*/
@Test
public void testEmptyInprogressLedger() throws Exception {
URI uri = BKJMUtil.createJournalURI("/hdfsjournal-emptyInprogressLedger");
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm = new BookKeeperJournalManager(conf, uri, nsi);
bkjm.format(nsi);
EditLogOutputStream out = bkjm.startLogSegment(1, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
;
for (long i = 1; i <= 100; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(i);
out.write(op);
}
out.close();
bkjm.finalizeLogSegment(1, 100);
out = bkjm.startLogSegment(101, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
out.close();
bkjm.close();
bkjm = new BookKeeperJournalManager(conf, uri, nsi);
bkjm.recoverUnfinalizedSegments();
out = bkjm.startLogSegment(101, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
for (long i = 1; i <= 100; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(i);
out.write(op);
}
out.close();
bkjm.finalizeLogSegment(101, 200);
bkjm.close();
}
/**
* Create a bkjm namespace, write a journal from txid 1, close stream. Try to create a new journal
* from txid 1. Should throw an exception.
*/
@Test
public void testWriteRestartFrom1() throws Exception {
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm =
new BookKeeperJournalManager(
conf, BKJMUtil.createJournalURI("/hdfsjournal-restartFrom1"), nsi);
bkjm.format(nsi);
long txid = 1;
long start = txid;
EditLogOutputStream out =
bkjm.startLogSegment(txid, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
for (long j = 1; j <= DEFAULT_SEGMENT_SIZE; j++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(txid++);
out.write(op);
}
out.close();
bkjm.finalizeLogSegment(start, (txid - 1));
txid = 1;
try {
out = bkjm.startLogSegment(txid, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
fail("Shouldn't be able to start another journal from " + txid + " when one already exists");
} catch (Exception ioe) {
LOG.info("Caught exception as expected", ioe);
}
// test border case
txid = DEFAULT_SEGMENT_SIZE;
try {
out = bkjm.startLogSegment(txid, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
fail("Shouldn't be able to start another journal from " + txid + " when one already exists");
} catch (IOException ioe) {
LOG.info("Caught exception as expected", ioe);
}
// open journal continuing from before
txid = DEFAULT_SEGMENT_SIZE + 1;
start = txid;
out = bkjm.startLogSegment(start, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
assertNotNull(out);
for (long j = 1; j <= DEFAULT_SEGMENT_SIZE; j++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(txid++);
out.write(op);
}
out.close();
bkjm.finalizeLogSegment(start, (txid - 1));
// open journal arbitarily far in the future
txid = DEFAULT_SEGMENT_SIZE * 4;
out = bkjm.startLogSegment(txid, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
assertNotNull(out);
}
@Test
public void testSimpleRecovery() throws Exception {
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm =
new BookKeeperJournalManager(
conf, BKJMUtil.createJournalURI("/hdfsjournal-simplerecovery"), nsi);
bkjm.format(nsi);
EditLogOutputStream out = bkjm.startLogSegment(1, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
;
for (long i = 1; i <= 100; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(i);
out.write(op);
}
out.setReadyToFlush();
out.flush();
out.abort();
out.close();
assertNull(zkc.exists(bkjm.finalizedLedgerZNode(1, 100), false));
assertNotNull(zkc.exists(bkjm.inprogressZNode(1), false));
bkjm.recoverUnfinalizedSegments();
assertNotNull(zkc.exists(bkjm.finalizedLedgerZNode(1, 100), false));
assertNull(zkc.exists(bkjm.inprogressZNode(1), false));
}
@Test
public void testSimpleRead() throws Exception {
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm =
new BookKeeperJournalManager(
conf, BKJMUtil.createJournalURI("/hdfsjournal-simpleread"), nsi);
bkjm.format(nsi);
final long numTransactions = 10000;
EditLogOutputStream out = bkjm.startLogSegment(1, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
;
for (long i = 1; i <= numTransactions; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(i);
out.write(op);
}
out.close();
bkjm.finalizeLogSegment(1, numTransactions);
List<EditLogInputStream> in = new ArrayList<EditLogInputStream>();
bkjm.selectInputStreams(in, 1, true);
try {
assertEquals(numTransactions, FSEditLogTestUtil.countTransactionsInStream(in.get(0)));
} finally {
in.get(0).close();
}
}
@Test
public void testNumberOfTransactionsWithInprogressAtEnd() throws Exception {
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm =
new BookKeeperJournalManager(
conf, BKJMUtil.createJournalURI("/hdfsjournal-inprogressAtEnd"), nsi);
bkjm.format(nsi);
long txid = 1;
for (long i = 0; i < 3; i++) {
long start = txid;
EditLogOutputStream out =
bkjm.startLogSegment(start, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
for (long j = 1; j <= DEFAULT_SEGMENT_SIZE; j++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(txid++);
out.write(op);
}
out.close();
bkjm.finalizeLogSegment(start, (txid - 1));
assertNotNull(zkc.exists(bkjm.finalizedLedgerZNode(start, (txid - 1)), false));
}
long start = txid;
EditLogOutputStream out =
bkjm.startLogSegment(start, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
for (long j = 1; j <= DEFAULT_SEGMENT_SIZE / 2; j++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(txid++);
out.write(op);
}
out.setReadyToFlush();
out.flush();
out.abort();
out.close();
long numTrans = bkjm.getNumberOfTransactions(1, true);
assertEquals((txid - 1), numTrans);
}
private String startAndFinalizeLogSegment(
BookKeeperJournalManager bkjm, int startTxid, int endTxid)
throws IOException, KeeperException, InterruptedException {
EditLogOutputStream out =
bkjm.startLogSegment(startTxid, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
for (long i = startTxid; i <= endTxid; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(i);
out.write(op);
}
out.close();
// finalize the inprogress_1 log segment.
bkjm.finalizeLogSegment(startTxid, endTxid);
String zkpath1 = bkjm.finalizedLedgerZNode(startTxid, endTxid);
assertNotNull(zkc.exists(zkpath1, false));
assertNull(zkc.exists(bkjm.inprogressZNode(startTxid), false));
return zkpath1;
}
@Test
public void testNumberOfTransactions() throws Exception {
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm =
new BookKeeperJournalManager(conf, BKJMUtil.createJournalURI("/hdfsjournal-txncount"), nsi);
bkjm.format(nsi);
EditLogOutputStream out = bkjm.startLogSegment(1, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
for (long i = 1; i <= 100; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(i);
out.write(op);
}
out.close();
bkjm.finalizeLogSegment(1, 100);
long numTrans = bkjm.getNumberOfTransactions(1, true);
assertEquals(100, numTrans);
}
/**
* Test that if we fail between finalizing an inprogress and deleting the corresponding inprogress
* znode.
*/
@Test
public void testRefinalizeAlreadyFinalizedInprogress() throws Exception {
URI uri = BKJMUtil.createJournalURI("/hdfsjournal-refinalizeInprogressLedger");
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm = new BookKeeperJournalManager(conf, uri, nsi);
bkjm.format(nsi);
EditLogOutputStream out = bkjm.startLogSegment(1, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
;
for (long i = 1; i <= 100; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(i);
out.write(op);
}
out.close();
bkjm.close();
String inprogressZNode = bkjm.inprogressZNode(1);
String finalizedZNode = bkjm.finalizedLedgerZNode(1, 100);
assertNotNull("inprogress znode doesn't exist", zkc.exists(inprogressZNode, null));
assertNull("finalized znode exists", zkc.exists(finalizedZNode, null));
byte[] inprogressData = zkc.getData(inprogressZNode, false, null);
// finalize
bkjm = new BookKeeperJournalManager(conf, uri, nsi);
bkjm.recoverUnfinalizedSegments();
bkjm.close();
assertNull("inprogress znode exists", zkc.exists(inprogressZNode, null));
assertNotNull("finalized znode doesn't exist", zkc.exists(finalizedZNode, null));
zkc.create(inprogressZNode, inprogressData, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
// should work fine
bkjm = new BookKeeperJournalManager(conf, uri, nsi);
bkjm.recoverUnfinalizedSegments();
bkjm.close();
}
/**
* If a journal manager has an corrupt inprogress node, ensure that we throw an error, as this
* should not be possible, and some third party has corrupted the zookeeper state
*/
@Test
public void testCorruptInprogressNode() throws Exception {
URI uri = BKJMUtil.createJournalURI("/hdfsjournal-corruptInprogress");
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm = new BookKeeperJournalManager(conf, uri, nsi);
bkjm.format(nsi);
EditLogOutputStream out = bkjm.startLogSegment(1, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
;
for (long i = 1; i <= 100; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(i);
out.write(op);
}
out.close();
bkjm.finalizeLogSegment(1, 100);
out = bkjm.startLogSegment(101, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
out.close();
bkjm.close();
String inprogressZNode = bkjm.inprogressZNode(101);
zkc.setData(inprogressZNode, "WholeLottaJunk".getBytes(), -1);
bkjm = new BookKeeperJournalManager(conf, uri, nsi);
try {
bkjm.recoverUnfinalizedSegments();
fail("Should have failed. There should be no way of creating" + " an empty inprogess znode");
} catch (IOException e) {
// correct behaviour
assertTrue(
"Exception different than expected", e.getMessage().contains("has no field named"));
} finally {
bkjm.close();
}
}
@Test
public void testNumberOfTransactionsWithGaps() throws Exception {
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm =
new BookKeeperJournalManager(conf, BKJMUtil.createJournalURI("/hdfsjournal-gaps"), nsi);
bkjm.format(nsi);
long txid = 1;
for (long i = 0; i < 3; i++) {
long start = txid;
EditLogOutputStream out =
bkjm.startLogSegment(start, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
for (long j = 1; j <= DEFAULT_SEGMENT_SIZE; j++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(txid++);
out.write(op);
}
out.close();
bkjm.finalizeLogSegment(start, txid - 1);
assertNotNull(zkc.exists(bkjm.finalizedLedgerZNode(start, txid - 1), false));
}
zkc.delete(bkjm.finalizedLedgerZNode(DEFAULT_SEGMENT_SIZE + 1, DEFAULT_SEGMENT_SIZE * 2), -1);
long numTrans = bkjm.getNumberOfTransactions(1, true);
assertEquals(DEFAULT_SEGMENT_SIZE, numTrans);
try {
numTrans = bkjm.getNumberOfTransactions(DEFAULT_SEGMENT_SIZE + 1, true);
fail("Should have thrown corruption exception by this point");
} catch (JournalManager.CorruptionException ce) {
// if we get here, everything is going good
}
numTrans = bkjm.getNumberOfTransactions((DEFAULT_SEGMENT_SIZE * 2) + 1, true);
assertEquals(DEFAULT_SEGMENT_SIZE, numTrans);
}
/**
* Test that a BookKeeper JM can continue to work across the failure of a bookie. This should be
* handled transparently by bookkeeper.
*/
@Test
public void testOneBookieFailure() throws Exception {
BookieServer bookieToFail = bkutil.newBookie();
BookieServer replacementBookie = null;
try {
int ensembleSize = numBookies + 1;
assertEquals(
"New bookie didn't start", ensembleSize, bkutil.checkBookiesUp(ensembleSize, 10));
// ensure that the journal manager has to use all bookies,
// so that a failure will fail the journal manager
Configuration conf = new Configuration();
conf.setInt(BookKeeperJournalManager.BKJM_BOOKKEEPER_ENSEMBLE_SIZE, ensembleSize);
conf.setInt(BookKeeperJournalManager.BKJM_BOOKKEEPER_QUORUM_SIZE, ensembleSize);
long txid = 1;
NamespaceInfo nsi = newNSInfo();
BookKeeperJournalManager bkjm =
new BookKeeperJournalManager(
conf, BKJMUtil.createJournalURI("/hdfsjournal-onebookiefailure"), nsi);
bkjm.format(nsi);
EditLogOutputStream out =
bkjm.startLogSegment(txid, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
for (long i = 1; i <= 3; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(txid++);
out.write(op);
}
out.setReadyToFlush();
out.flush();
replacementBookie = bkutil.newBookie();
assertEquals(
"replacement bookie didn't start",
ensembleSize + 1,
bkutil.checkBookiesUp(ensembleSize + 1, 10));
bookieToFail.shutdown();
assertEquals("New bookie didn't die", ensembleSize, bkutil.checkBookiesUp(ensembleSize, 10));
for (long i = 1; i <= 3; i++) {
FSEditLogOp op = FSEditLogTestUtil.getNoOpInstance();
op.setTransactionId(txid++);
out.write(op);
}
out.setReadyToFlush();
out.flush();
} catch (Exception e) {
LOG.error("Exception in test", e);
throw e;
} finally {
if (replacementBookie != null) {
replacementBookie.shutdown();
}
bookieToFail.shutdown();
if (bkutil.checkBookiesUp(numBookies, 30) != numBookies) {
LOG.warn("Not all bookies from this test shut down, expect errors");
}
}
}