private File findIndexFile(long ledgerId) throws IOException {
String ledgerName = getLedgerName(ledgerId);
for (File d : ledgerDirsManager.getAllLedgerDirs()) {
File lf = new File(d, ledgerName);
if (lf.exists()) {
return lf;
}
}
return null;
}
/**
* This method will look within the ledger directories for the ledger index files. That will
* comprise the set of active ledgers this particular BookieServer knows about that have not yet
* been deleted by the BookKeeper Client. This is called only once during initialization.
*/
private void getActiveLedgers() throws IOException {
// Ledger index files are stored in a file hierarchy with a parent and
// grandParent directory. We'll have to go two levels deep into these
// directories to find the index files.
for (File ledgerDirectory : ledgerDirsManager.getAllLedgerDirs()) {
File[] grandParents = ledgerDirectory.listFiles();
if (grandParents == null) {
continue;
}
for (File grandParent : grandParents) {
if (grandParent.isDirectory()) {
File[] parents = grandParent.listFiles();
if (parents == null) {
continue;
}
for (File parent : parents) {
if (parent.isDirectory()) {
File[] indexFiles = parent.listFiles();
if (indexFiles == null) {
continue;
}
for (File index : indexFiles) {
if (!index.isFile()
|| (!index.getName().endsWith(IDX) && !index.getName().endsWith(RLOC))) {
continue;
}
// We've found a ledger index file. The file
// name is the HexString representation of the
// ledgerId.
String ledgerIdInHex = index.getName().replace(RLOC, "").replace(IDX, "");
if (index.getName().endsWith(RLOC)) {
if (findIndexFile(Long.parseLong(ledgerIdInHex)) != null) {
if (!index.delete()) {
LOG.warn("Deleting the rloc file " + index + " failed");
}
continue;
} else {
File dest = new File(index.getParentFile(), ledgerIdInHex + IDX);
if (!index.renameTo(dest)) {
throw new IOException(
"Renaming rloc file " + index + " to index file has failed");
}
}
}
activeLedgers.put(Long.parseLong(ledgerIdInHex, 16), true);
}
}
}
}
}
}
}
/**
* Check that the environment for the bookie is correct. This means that the configuration has
* stayed the same as the first run and the filesystem structure is up to date.
*/
private void checkEnvironment(ZooKeeper zk) throws BookieException, IOException {
List<File> allLedgerDirs =
new ArrayList<File>(
ledgerDirsManager.getAllLedgerDirs().size()
+ indexDirsManager.getAllLedgerDirs().size());
allLedgerDirs.addAll(ledgerDirsManager.getAllLedgerDirs());
if (indexDirsManager != ledgerDirsManager) {
allLedgerDirs.addAll(indexDirsManager.getAllLedgerDirs());
}
if (zk == null) { // exists only for testing, just make sure directories are correct
checkDirectoryStructure(journalDirectory);
for (File dir : allLedgerDirs) {
checkDirectoryStructure(dir);
}
return;
}
try {
String instanceId = getInstanceId(zk);
boolean newEnv = false;
Cookie masterCookie = Cookie.generateCookie(conf);
if (null != instanceId) {
masterCookie.setInstanceId(instanceId);
}
try {
Cookie zkCookie = Cookie.readFromZooKeeper(zk, conf);
masterCookie.verify(zkCookie);
} catch (KeeperException.NoNodeException nne) {
newEnv = true;
}
List<File> missedCookieDirs = new ArrayList<File>();
checkDirectoryStructure(journalDirectory);
// try to read cookie from journal directory
try {
Cookie journalCookie = Cookie.readFromDirectory(journalDirectory);
journalCookie.verify(masterCookie);
} catch (FileNotFoundException fnf) {
missedCookieDirs.add(journalDirectory);
}
for (File dir : allLedgerDirs) {
checkDirectoryStructure(dir);
try {
Cookie c = Cookie.readFromDirectory(dir);
c.verify(masterCookie);
} catch (FileNotFoundException fnf) {
missedCookieDirs.add(dir);
}
}
if (!newEnv && missedCookieDirs.size() > 0) {
LOG.error(
"Cookie exists in zookeeper, but not in all local directories. "
+ " Directories missing cookie file are "
+ missedCookieDirs);
throw new BookieException.InvalidCookieException();
}
if (newEnv) {
if (missedCookieDirs.size() > 0) {
LOG.debug("Directories missing cookie file are {}", missedCookieDirs);
masterCookie.writeToDirectory(journalDirectory);
for (File dir : allLedgerDirs) {
masterCookie.writeToDirectory(dir);
}
}
masterCookie.writeToZooKeeper(zk, conf);
}
} catch (KeeperException ke) {
LOG.error("Couldn't access cookie in zookeeper", ke);
throw new BookieException.InvalidCookieException(ke);
} catch (UnknownHostException uhe) {
LOG.error("Couldn't check cookies, networking is broken", uhe);
throw new BookieException.InvalidCookieException(uhe);
} catch (IOException ioe) {
LOG.error("Error accessing cookie on disks", ioe);
throw new BookieException.InvalidCookieException(ioe);
} catch (InterruptedException ie) {
LOG.error("Thread interrupted while checking cookies, exiting", ie);
throw new BookieException.InvalidCookieException(ie);
}
}