/** Checks the JournalManager.isSegmentInProgress() */
@Test
public void testInprogressSegment() throws IOException {
File f = new File(TestEditLog.TEST_DIR + "/testInprogressSegment");
// abort after the 5th roll
NNStorage storage =
setupEdits(Collections.<URI>singletonList(f.toURI()), 5, new AbortSpec(5, 0));
StorageDirectory sd = storage.dirIterator(NameNodeDirType.EDITS).next();
FileJournalManager jm = new FileJournalManager(sd);
assertEquals(5 * TXNS_PER_ROLL + TXNS_PER_FAIL, jm.getNumberOfTransactions(0));
boolean isOneInProgress = false;
boolean isOneNotInProgress = false;
for (RemoteEditLog rel : jm.getRemoteEditLogs(0)) {
if (rel.inProgress()) {
isOneInProgress = true;
assertTrue(jm.isSegmentInProgress(rel.getStartTxId()));
} else {
isOneNotInProgress = true;
assertFalse(jm.isSegmentInProgress(rel.getStartTxId()));
}
}
assertTrue(isOneInProgress);
assertTrue(isOneNotInProgress);
}
/**
* Return a manifest of what finalized edit logs are available. All available edit logs are
* returned starting from the transaction id passed.
*
* @param fromTxId Starting transaction id to read the logs.
* @return RemoteEditLogManifest object.
*/
public synchronized RemoteEditLogManifest getEditLogManifest(long fromTxId) {
// Collect RemoteEditLogs available from each FileJournalManager
List<RemoteEditLog> allLogs = Lists.newArrayList();
for (JournalAndStream j : journals) {
if (j.getManager() instanceof FileJournalManager) {
FileJournalManager fjm = (FileJournalManager) j.getManager();
try {
allLogs.addAll(fjm.getRemoteEditLogs(fromTxId));
} catch (Throwable t) {
LOG.warn("Cannot list edit logs in " + fjm, t);
}
}
}
// Group logs by their starting txid
ImmutableListMultimap<Long, RemoteEditLog> logsByStartTxId =
Multimaps.index(allLogs, RemoteEditLog.GET_START_TXID);
long curStartTxId = fromTxId;
List<RemoteEditLog> logs = Lists.newArrayList();
while (true) {
ImmutableList<RemoteEditLog> logGroup = logsByStartTxId.get(curStartTxId);
if (logGroup.isEmpty()) {
// we have a gap in logs - for example because we recovered some old
// storage directory with ancient logs. Clear out any logs we've
// accumulated so far, and then skip to the next segment of logs
// after the gap.
SortedSet<Long> startTxIds = Sets.newTreeSet(logsByStartTxId.keySet());
startTxIds = startTxIds.tailSet(curStartTxId);
if (startTxIds.isEmpty()) {
break;
} else {
if (LOG.isDebugEnabled()) {
LOG.debug(
"Found gap in logs at "
+ curStartTxId
+ ": "
+ "not returning previous logs in manifest.");
}
logs.clear();
curStartTxId = startTxIds.first();
continue;
}
}
// Find the one that extends the farthest forward
RemoteEditLog bestLog = Collections.max(logGroup);
logs.add(bestLog);
// And then start looking from after that point
curStartTxId = bestLog.getEndTxId() + 1;
}
RemoteEditLogManifest ret = new RemoteEditLogManifest(logs);
if (LOG.isDebugEnabled()) {
LOG.debug("Generated manifest for logs since " + fromTxId + ":" + ret);
}
return ret;
}
