Example usage for org.apache.zookeeper KeeperException code

List of usage examples for org.apache.zookeeper KeeperException code

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From source file:org.apache.accumulo.server.security.handler.ZKPermHandler.java

License:Apache License

@Override
public boolean hasSystemPermission(String user, SystemPermission permission) throws AccumuloSecurityException {
    byte[] perms;
    try {/*from w w  w. j  a  va  2  s. c om*/
        String path = ZKUserPath + "/" + user + ZKUserSysPerms;
        ZooReaderWriter.getInstance().sync(path);
        perms = ZooReaderWriter.getInstance().getData(path, null);
    } catch (KeeperException e) {
        if (e.code() == Code.NONODE) {
            return false;
        }
        log.warn("Unhandled KeeperException, failing closed for table permission check", e);
        return false;
    } catch (InterruptedException e) {
        log.warn("Unhandled InterruptedException, failing closed for table permission check", e);
        return false;
    }

    if (perms == null)
        return false;
    return ZKSecurityTool.convertSystemPermissions(perms).contains(permission);
}

From source file:org.apache.accumulo.server.security.handler.ZKPermHandler.java

License:Apache License

@Override
public void cleanUser(String user) throws AccumuloSecurityException {
    try {// w w w .j  a  v a  2 s.  c om
        synchronized (zooCache) {
            IZooReaderWriter zoo = ZooReaderWriter.getInstance();
            zoo.recursiveDelete(ZKUserPath + "/" + user + ZKUserSysPerms, NodeMissingPolicy.SKIP);
            zoo.recursiveDelete(ZKUserPath + "/" + user + ZKUserTablePerms, NodeMissingPolicy.SKIP);
            zoo.recursiveDelete(ZKUserPath + "/" + user + ZKUserNamespacePerms, NodeMissingPolicy.SKIP);
            zooCache.clear(ZKUserPath + "/" + user);
        }
    } catch (InterruptedException e) {
        log.error("{}", e.getMessage(), e);
        throw new RuntimeException(e);
    } catch (KeeperException e) {
        log.error("{}", e.getMessage(), e);
        if (e.code().equals(KeeperException.Code.NONODE))
            throw new AccumuloSecurityException(user, SecurityErrorCode.USER_DOESNT_EXIST, e);
        throw new AccumuloSecurityException(user, SecurityErrorCode.CONNECTION_ERROR, e);

    }
}

From source file:org.apache.accumulo.server.security.ZKAuthenticator.java

License:Apache License

/**
 * Creates a user with no permissions whatsoever
 *///from   w  w  w  . ja v a2  s . c o m
public void createUser(AuthInfo credentials, String user, byte[] pass, Authorizations authorizations)
        throws AccumuloSecurityException {
    if (!hasSystemPermission(credentials, credentials.user, SystemPermission.CREATE_USER))
        throw new AccumuloSecurityException(credentials.user, SecurityErrorCode.PERMISSION_DENIED);

    if (!hasSystemPermission(credentials, credentials.user, SystemPermission.ALTER_USER)) {
        Authorizations creatorAuths = getUserAuthorizations(credentials, credentials.user);
        for (byte[] auth : authorizations.getAuthorizations())
            if (!creatorAuths.contains(auth)) {
                log.info("User " + credentials.user + " attempted to create a user " + user
                        + " with authorization " + new String(auth) + " they did not have");
                throw new AccumuloSecurityException(credentials.user, SecurityErrorCode.BAD_AUTHORIZATIONS);
            }
    }

    // don't allow creating a user with the same name as system user
    if (user.equals(SecurityConstants.SYSTEM_USERNAME))
        throw new AccumuloSecurityException(user, SecurityErrorCode.PERMISSION_DENIED);

    try {
        constructUser(user, Tool.createPass(pass), new TreeSet<SystemPermission>(),
                new HashMap<String, Set<TablePermission>>(), authorizations);
        log.info("Created user " + user + " at the request of user " + credentials.user);
    } catch (KeeperException e) {
        log.error(e, e);
        if (e.code().equals(KeeperException.Code.NODEEXISTS))
            throw new AccumuloSecurityException(user, SecurityErrorCode.USER_EXISTS, e);
        throw new AccumuloSecurityException(user, SecurityErrorCode.CONNECTION_ERROR, e);
    } catch (InterruptedException e) {
        log.error(e, e);
        throw new RuntimeException(e);
    } catch (AccumuloException e) {
        log.error(e, e);
        throw new AccumuloSecurityException(user, SecurityErrorCode.DEFAULT_SECURITY_ERROR, e);
    }
}

From source file:org.apache.accumulo.server.security.ZKAuthenticator.java

License:Apache License

public void dropUser(AuthInfo credentials, String user) throws AccumuloSecurityException {
    if (!hasSystemPermission(credentials, credentials.user, SystemPermission.DROP_USER))
        throw new AccumuloSecurityException(credentials.user, SecurityErrorCode.PERMISSION_DENIED);

    // can't delete root or system users
    if (user.equals(getRootUsername()) || user.equals(SecurityConstants.SYSTEM_USERNAME))
        throw new AccumuloSecurityException(user, SecurityErrorCode.PERMISSION_DENIED);

    try {//from ww  w . j a  va 2 s .c o m
        synchronized (zooCache) {
            zooCache.clear();
            ZooReaderWriter.getRetryingInstance().recursiveDelete(ZKUserPath + "/" + user,
                    NodeMissingPolicy.FAIL);
        }
        log.info("Deleted user " + user + " at the request of user " + credentials.user);
    } catch (InterruptedException e) {
        log.error(e, e);
        throw new RuntimeException(e);
    } catch (KeeperException e) {
        log.error(e, e);
        if (e.code().equals(KeeperException.Code.NONODE))
            throw new AccumuloSecurityException(user, SecurityErrorCode.USER_DOESNT_EXIST, e);
        throw new AccumuloSecurityException(user, SecurityErrorCode.CONNECTION_ERROR, e);
    }
}

From source file:org.apache.accumulo.tserver.TabletServer.java

License:Apache License

private void announceExistence() {
    IZooReaderWriter zoo = ZooReaderWriter.getInstance();
    try {//from w ww  .  j  a  v  a 2  s .c o  m
        String zPath = ZooUtil.getRoot(getInstance()) + Constants.ZTSERVERS + "/" + getClientAddressString();

        try {
            zoo.putPersistentData(zPath, new byte[] {}, NodeExistsPolicy.SKIP);
        } catch (KeeperException e) {
            if (KeeperException.Code.NOAUTH == e.code()) {
                log.error(
                        "Failed to write to ZooKeeper. Ensure that accumulo-site.xml, specifically instance.secret, is consistent.");
            }
            throw e;
        }

        tabletServerLock = new ZooLock(zPath);

        LockWatcher lw = new LockWatcher() {

            @Override
            public void lostLock(final LockLossReason reason) {
                Halt.halt(serverStopRequested ? 0 : 1, new Runnable() {
                    @Override
                    public void run() {
                        if (!serverStopRequested)
                            log.error("Lost tablet server lock (reason = " + reason + "), exiting.");
                        gcLogger.logGCInfo(getConfiguration());
                    }
                });
            }

            @Override
            public void unableToMonitorLockNode(final Throwable e) {
                Halt.halt(1, new Runnable() {
                    @Override
                    public void run() {
                        log.error("Lost ability to monitor tablet server lock, exiting.", e);
                    }
                });

            }
        };

        byte[] lockContent = new ServerServices(getClientAddressString(), Service.TSERV_CLIENT).toString()
                .getBytes(UTF_8);
        for (int i = 0; i < 120 / 5; i++) {
            zoo.putPersistentData(zPath, new byte[0], NodeExistsPolicy.SKIP);

            if (tabletServerLock.tryLock(lw, lockContent)) {
                log.debug("Obtained tablet server lock " + tabletServerLock.getLockPath());
                lockID = tabletServerLock.getLockID()
                        .serialize(ZooUtil.getRoot(getInstance()) + Constants.ZTSERVERS + "/");
                return;
            }
            log.info("Waiting for tablet server lock");
            sleepUninterruptibly(5, TimeUnit.SECONDS);
        }
        String msg = "Too many retries, exiting.";
        log.info(msg);
        throw new RuntimeException(msg);
    } catch (Exception e) {
        log.info("Could not obtain tablet server lock, exiting.", e);
        throw new RuntimeException(e);
    }
}

From source file:org.apache.blur.zookeeper.WatchChildren.java

License:Apache License

public WatchChildren watch(final OnChange onChange, long fireAnywayTime, TimeUnit timeUnit) {
    if (_debug) {
        StringWriter writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        new Throwable().printStackTrace(printWriter);
        printWriter.close();/* w w  w  . jav a 2s . c o m*/
        _debugStackTrace = writer.toString();
    }
    final long timeToFireAnywayTime = TimeUnit.MILLISECONDS.convert(fireAnywayTime, timeUnit);
    _watchThread = new Thread(new Runnable() {
        @Override
        public void run() {
            Watcher watcher = new Watcher() {
                @Override
                public void process(WatchedEvent event) {
                    synchronized (_lock) {
                        _lock.notify();
                    }
                }
            };
            startDoubleCheckThread();
            while (_running.get()) {
                synchronized (_lock) {
                    try {
                        List<String> children = _zooKeeper.getChildren(_path, watcher);
                        try {
                            onChange.action(children);
                            _children = children;
                        } catch (Throwable t) {
                            LOG.error("Unknown error during onchange action [" + this + "].", t);
                        }
                        _lock.wait(timeToFireAnywayTime);
                    } catch (KeeperException e) {
                        if (!_running.get()) {
                            LOG.info("Error [{0}]", e.getMessage());
                            return;
                        }
                        if (e.code() == Code.NONODE) {
                            if (_debug) {
                                LOG.debug("Path for watching not found [{0}], no longer watching, debug [{1}].",
                                        _path, _debugStackTrace);
                            } else {
                                LOG.debug("Path for watching not found [{0}], no longer watching.", _path);
                            }
                            close();
                            return;
                        }
                        if (_debug) {
                            LOG.error("Unknown error [{0}]", e, _debugStackTrace);
                        } else {
                            LOG.error("Unknown error", e);
                        }
                        throw new RuntimeException(e);
                    } catch (InterruptedException e) {
                        return;
                    }
                }
            }
            _running.set(false);
        }
    });
    _watchThread.setName("Watch Children [" + _path + "][" + instance + "]");
    _watchThread.setDaemon(true);
    _watchThread.start();
    return this;
}

From source file:org.apache.blur.zookeeper.WatchChildren.java

License:Apache License

private void startDoubleCheckThread() {
    _doubleCheckThread = new Thread(new Runnable() {
        @Override//from www  .  j  ava  2  s  .  co m
        public void run() {
            while (_running.get()) {
                try {
                    synchronized (_running) {
                        _running.wait(_delay);
                    }
                    if (!_running.get()) {
                        return;
                    }
                    if (_zooKeeper.exists(_path, false) == null) {
                        LOG.debug("Path for watching not found [{0}], no longer double checking.", _path);
                        return;
                    }
                    List<String> children = _zooKeeper.getChildren(_path, false);
                    if (!isCorrect(children)) {
                        LOG.error("Double check triggered for [" + _path + "] [" + instance + "]");
                        synchronized (_lock) {
                            _lock.notify();
                        }
                    }
                } catch (KeeperException e) {
                    if (!_running.get()) {
                        LOG.info("Error [{0}]", e.getMessage());
                        return;
                    }
                    if (e.code() == Code.SESSIONEXPIRED) {
                        LOG.warn("Session expired for [" + _path + "] [" + instance + "]");
                        return;
                    }
                    LOG.error("Unknown error", e);
                    throw new RuntimeException(e);
                } catch (InterruptedException e) {
                    return;
                }
            }
        }
    });
    _doubleCheckThread.setName("Poll Watch Children [" + _path + "][" + instance + "]");
    _doubleCheckThread.setDaemon(true);
    _doubleCheckThread.start();
}

From source file:org.apache.blur.zookeeper.WatchNodeData.java

License:Apache License

private void startDoubleCheckThread() {
    _doubleCheckThread = new Thread(new Runnable() {

        @Override/*w  w w.jav  a  2s  . c o  m*/
        public void run() {
            while (_running.get()) {
                try {
                    synchronized (_running) {
                        _running.wait(_delay);
                    }
                    if (!_running.get()) {
                        return;
                    }
                    Stat stat = _zooKeeper.exists(_path, false);
                    if (stat == null) {
                        LOG.debug("Path [{0}] not found.", _path);
                        synchronized (_lock) {
                            _lock.notify();
                        }
                        return;
                    }

                    byte[] data = _zooKeeper.getData(_path, false, stat);
                    if (!isCorrect(data)) {
                        LOG.debug("Double check triggered for [" + _path + "]");
                        synchronized (_lock) {
                            _lock.notify();
                        }
                    }
                } catch (KeeperException e) {
                    if (!_running.get()) {
                        LOG.info("Error [{0}]", e.getMessage());
                        return;
                    }
                    if (e.code() == Code.SESSIONEXPIRED) {
                        LOG.warn("Session expired for [" + _path + "] [" + instance + "]");
                        return;
                    }
                    LOG.error("Unknown error", e);
                    throw new RuntimeException(e);
                } catch (InterruptedException e) {
                    return;
                }
            }
        }
    });
    _doubleCheckThread.setName("Poll Watch Data [" + _path + "][" + instance + "]");
    _doubleCheckThread.setDaemon(true);
    _doubleCheckThread.start();
}

From source file:org.apache.blur.zookeeper.WatchNodeExistance.java

License:Apache License

private void startDoubleCheckThread() {
    _doubleCheckThread = new Thread(new Runnable() {
        @Override/*from   w  w w .  j av a2 s.  c o  m*/
        public void run() {
            while (_running.get()) {
                try {
                    synchronized (_running) {
                        _running.wait(_delay);
                    }
                    if (!_running.get()) {
                        return;
                    }
                    Stat stat = _zooKeeper.exists(_path, false);
                    if (!isCorrect(stat)) {
                        LOG.debug("Double check triggered for [" + _path + "]");
                        synchronized (_lock) {
                            _lock.notify();
                        }
                    }
                } catch (KeeperException e) {
                    if (!_running.get()) {
                        LOG.info("Error [{0}]", e.getMessage());
                        return;
                    }
                    if (e.code() == Code.SESSIONEXPIRED) {
                        LOG.warn("Session expired for [" + _path + "] [" + instance + "]");
                        return;
                    }
                    LOG.error("Unknown error", e);
                    throw new RuntimeException(e);
                } catch (InterruptedException e) {
                    return;
                }
            }
        }
    });
    _doubleCheckThread.setName("Poll Watch Existance [" + _path + "][" + instance + "]");
    _doubleCheckThread.setDaemon(true);
    _doubleCheckThread.start();
}

From source file:org.apache.blur.zookeeper.ZooKeeperClient.java

License:Apache License

public <T> T execute(ZKExecutor<T> executor) throws KeeperException, InterruptedException {
    final long timestmap = System.currentTimeMillis();
    int sessionTimeout = getSessionTimeout();
    if (sessionTimeout == 0) {
        sessionTimeout = internalSessionTimeout;
    }//w  w  w.  j av  a 2s.  co  m
    while (true) {
        Tracer trace = Trace.trace("remote call - zookeeper", Trace.param("method", executor._name),
                Trace.param("toString", executor.toString()));
        try {
            return executor.execute();
        } catch (KeeperException e) {
            if (e.code() == Code.CONNECTIONLOSS && timestmap + sessionTimeout >= System.currentTimeMillis()) {
                LOG.warn("Connection loss");
                ZkUtils.pause(this);
                continue;
            }
            throw e;
        } finally {
            trace.done();
        }
    }
}