Examples with ConcurrentModificationException java.util.ConcurrentModificationException used on opensource projects

Example 26 with ConcurrentModificationException

use of java.util.ConcurrentModificationException in project cloudstack by apache.

the class NetappManagerImpl method destroyVolumeOnFiler.

/**
     * This method destroys the volume on netapp filer
     * @param ipAddress -- ip address of filer
     * @param aggrName -- name of containing aggregate
     * @param volName -- name of volume to destroy
     * @throws ResourceInUseException
     * @throws NaException
     * @throws NaAPIFailedException
     */
@Override
@DB
public void destroyVolumeOnFiler(String ipAddress, String aggrName, String volName) throws ServerException, InvalidParameterValueException, ResourceInUseException {
    NaElement xi0;
    NaElement xi1;
    NetappVolumeVO volume = null;
    volume = _volumeDao.findVolume(ipAddress, aggrName, volName);
    if (volume == null) {
        s_logger.warn("The volume does not exist in our system");
        throw new InvalidParameterValueException("The given tuple:" + ipAddress + "," + aggrName + "," + volName + " doesn't exist in our system");
    }
    List<LunVO> lunsOnVol = _lunDao.listLunsByVolId(volume.getId());
    if (lunsOnVol != null && lunsOnVol.size() > 0) {
        s_logger.warn("There are luns on the volume");
        throw new ResourceInUseException("There are luns on the volume");
    }
    final TransactionLegacy txn = TransactionLegacy.currentTxn();
    txn.start();
    PoolVO pool = _poolDao.findById(volume.getPoolId());
    if (pool == null) {
        throw new InvalidParameterValueException("Failed to find pool for given volume");
    //FIXME: choose a better exception. this is a db integrity exception
    }
    pool = _poolDao.acquireInLockTable(pool.getId());
    if (pool == null) {
        throw new ConcurrentModificationException("Failed to acquire lock on pool " + volume.getPoolId());
    }
    NaServer s = null;
    try {
        s = getServer(volume.getIpAddress(), volume.getUsername(), volume.getPassword());
        //bring the volume down
        xi0 = new NaElement("volume-offline");
        xi0.addNewChild("name", volName);
        s.invokeElem(xi0);
        //now destroy it
        xi1 = new NaElement("volume-destroy");
        xi1.addNewChild("name", volName);
        s.invokeElem(xi1);
        //now delete from our records
        _volumeDao.remove(volume.getId());
        txn.commit();
    } catch (UnknownHostException uhe) {
        s_logger.warn("Unable to delete volume on filer ", uhe);
        throw new ServerException("Unable to delete volume on filer", uhe);
    } catch (NaAPIFailedException naf) {
        s_logger.warn("Unable to delete volume on filer ", naf);
        if (naf.getErrno() == 13040) {
            s_logger.info("Deleting the volume: " + volName);
            _volumeDao.remove(volume.getId());
            txn.commit();
        }
        throw new ServerException("Unable to delete volume on filer", naf);
    } catch (NaException nae) {
        txn.rollback();
        s_logger.warn("Unable to delete volume on filer ", nae);
        throw new ServerException("Unable to delete volume on filer", nae);
    } catch (IOException ioe) {
        txn.rollback();
        s_logger.warn("Unable to delete volume on filer ", ioe);
        throw new ServerException("Unable to delete volume on filer", ioe);
    } finally {
        if (pool != null) {
            _poolDao.releaseFromLockTable(pool.getId());
        }
        if (s != null)
            s.close();
    }
}

Example 27 with ConcurrentModificationException

use of java.util.ConcurrentModificationException in project jackrabbit by apache.

the class VersionIteratorImpl method nextVersion.

/**
     * {@inheritDoc}
     */
public Version nextVersion() {
    if (versions.isEmpty()) {
        throw new NoSuchElementException();
    }
    NodeId id = versions.removeFirst();
    pos++;
    try {
        return (Version) session.getNodeById(id);
    } catch (RepositoryException e) {
        throw new ConcurrentModificationException("Unable to provide element: " + e.toString());
    }
}

Example 28 with ConcurrentModificationException

use of java.util.ConcurrentModificationException in project jackrabbit by apache.

the class ItemSaveOperation method perform.

public Object perform(SessionContext context) throws RepositoryException {
    SessionItemStateManager stateMgr = context.getItemStateManager();
    /**
         * build list of transient (i.e. new & modified) states that
         * should be persisted
         */
    Collection<ItemState> dirty;
    try {
        dirty = getTransientStates(context.getItemStateManager());
    } catch (ConcurrentModificationException e) {
        String msg = "Concurrent modification; session is closed";
        log.error(msg, e);
        context.getSessionImpl().logout();
        throw e;
    }
    if (dirty.size() == 0) {
        // no transient items, nothing to do here
        return this;
    }
    /**
         * build list of transient descendants in the attic
         * (i.e. those marked as 'removed')
         */
    Collection<ItemState> removed = getRemovedStates(context.getItemStateManager());
    // All affected item states. The keys are used to look up whether
    // an item is affected, and the values are iterated through below
    Map<ItemId, ItemState> affected = new HashMap<ItemId, ItemState>(dirty.size() + removed.size());
    for (ItemState state : dirty) {
        affected.put(state.getId(), state);
    }
    for (ItemState state : removed) {
        affected.put(state.getId(), state);
    }
    /**
         * make sure that this save operation is totally 'self-contained'
         * and independent; items within the scope of this save operation
         * must not have 'external' dependencies;
         * (e.g. moving a node requires that the target node including both
         * old and new parents are saved)
         */
    for (ItemState transientState : affected.values()) {
        if (transientState.isNode()) {
            NodeState nodeState = (NodeState) transientState;
            Set<NodeId> dependentIDs = new HashSet<NodeId>();
            if (nodeState.hasOverlayedState()) {
                NodeState overlayedState = (NodeState) nodeState.getOverlayedState();
                NodeId oldParentId = overlayedState.getParentId();
                NodeId newParentId = nodeState.getParentId();
                if (oldParentId != null) {
                    if (newParentId == null) {
                        // to dependencies
                        if (overlayedState.isShareable()) {
                            dependentIDs.addAll(overlayedState.getSharedSet());
                        } else {
                            dependentIDs.add(oldParentId);
                        }
                    } else {
                        if (!oldParentId.equals(newParentId)) {
                            // node has been moved to a new location,
                            // add old and new parent to dependencies
                            dependentIDs.add(oldParentId);
                            dependentIDs.add(newParentId);
                        } else {
                            // the node has been renamed (JCR-1034)
                            if (!affected.containsKey(newParentId) && stateMgr.hasTransientItemState(newParentId)) {
                                try {
                                    NodeState parent = (NodeState) stateMgr.getTransientItemState(newParentId);
                                    // check parent's renamed child node entries
                                    for (ChildNodeEntry cne : parent.getRenamedChildNodeEntries()) {
                                        if (cne.getId().equals(nodeState.getId())) {
                                            // node has been renamed,
                                            // add parent to dependencies
                                            dependentIDs.add(newParentId);
                                        }
                                    }
                                } catch (ItemStateException ise) {
                                    // should never get here
                                    log.warn("failed to retrieve transient state: " + newParentId, ise);
                                }
                            }
                        }
                    }
                }
            }
            // removed child node entries
            for (ChildNodeEntry cne : nodeState.getRemovedChildNodeEntries()) {
                dependentIDs.add(cne.getId());
            }
            // added child node entries
            for (ChildNodeEntry cne : nodeState.getAddedChildNodeEntries()) {
                dependentIDs.add(cne.getId());
            }
            // are within the scope of this save operation
            for (NodeId id : dependentIDs) {
                if (!affected.containsKey(id)) {
                    // otherwise ignore them
                    if (stateMgr.hasTransientItemState(id) || stateMgr.hasTransientItemStateInAttic(id)) {
                        // need to save dependency as well
                        String msg = context.getItemManager().safeGetJCRPath(id) + " needs to be saved as well.";
                        log.debug(msg);
                        throw new ConstraintViolationException(msg);
                    }
                }
            }
        }
    }
    // validate access and node type constraints
    // (this will also validate child removals)
    validateTransientItems(context, dirty, removed);
    // start the update operation
    try {
        stateMgr.edit();
    } catch (IllegalStateException e) {
        throw new RepositoryException("Unable to start edit operation", e);
    }
    boolean succeeded = false;
    try {
        // process transient items marked as 'removed'
        removeTransientItems(context.getItemStateManager(), removed);
        // process transient items that have change in mixins
        processShareableNodes(context.getRepositoryContext().getNodeTypeRegistry(), dirty);
        // initialize version histories for new nodes (might generate new transient state)
        if (initVersionHistories(context, dirty)) {
            // re-build the list of transient states because the previous call
            // generated new transient state
            dirty = getTransientStates(context.getItemStateManager());
        }
        // process 'new' or 'modified' transient states
        persistTransientItems(context.getItemManager(), dirty);
        // item state which is not referenced by any node instance.
        for (ItemState transientState : dirty) {
            // dispose the transient state, it is no longer used
            stateMgr.disposeTransientItemState(transientState);
        }
        // end update operation
        stateMgr.update();
        // update operation succeeded
        succeeded = true;
    } catch (StaleItemStateException e) {
        throw new InvalidItemStateException("Unable to update a stale item: " + this, e);
    } catch (ItemStateException e) {
        throw new RepositoryException("Unable to update item: " + this, e);
    } finally {
        if (!succeeded) {
            // update operation failed, cancel all modifications
            stateMgr.cancel();
            // JCR-288: if an exception has been thrown during
            // update() the transient changes have already been
            // applied by persistTransientItems() and we need to
            // restore transient state, i.e. undo the effect of
            // persistTransientItems()
            restoreTransientItems(context, dirty);
        }
    }
    // items in store().
    for (ItemState transientState : removed) {
        // dispose the transient state, it is no longer used
        stateMgr.disposeTransientItemStateInAttic(transientState);
    }
    return this;
}

Example 29 with ConcurrentModificationException

use of java.util.ConcurrentModificationException in project jena by apache.

the class ArrayBunch method iterator.

@Override
public ExtendedIterator<Triple> iterator(final HashCommon.NotifyEmpty container) {
    //        System.err.println( ">> (done)" );
    return new NiceIterator<Triple>() {

        protected final int initialChanges = changes;

        protected int i = size;

        protected final Triple[] e = elements;

        @Override
        public boolean hasNext() {
            if (changes > initialChanges)
                throw new ConcurrentModificationException();
            return i > 0;
        }

        @Override
        public Triple next() {
            if (changes > initialChanges)
                throw new ConcurrentModificationException();
            if (i == 0)
                noElements("no elements left in ArrayBunch iteration");
            return e[--i];
        }

        @Override
        public void remove() {
            if (changes > initialChanges)
                throw new ConcurrentModificationException();
            //                System.err.println( ">> ArrayBunch.iterator::remove" );
            //                System.err.println( "++  size currently " + size );
            //                System.err.println( "++  container is " + container );
            //                System.err.println( "++  selector currently " + i + " (triple " + e[i] + ")" );
            int last = --size;
            e[i] = e[last];
            e[last] = null;
            if (size == 0)
                container.emptied();
        //                System.err.println( "++  post remove, triples are:" );
        //                for (int j = 0; j < size; j += 1) System.err.println( "==    " + e[j] );
        }
    };
}

Example 30 with ConcurrentModificationException

use of java.util.ConcurrentModificationException in project lucene-solr by apache.

the class TestLRUQueryCache method testDetectMutatedQueries.

public void testDetectMutatedQueries() throws IOException {
    LuceneTestCase.assumeFalse("LUCENE-7604: For some unknown reason the non-constant BadQuery#hashCode() does not trigger ConcurrentModificationException on Java 9 b150", Constants.JRE_IS_MINIMUM_JAVA9);
    Directory dir = newDirectory();
    final RandomIndexWriter w = new RandomIndexWriter(random(), dir);
    w.addDocument(new Document());
    IndexReader reader = w.getReader();
    // size of 1 so that 2nd query evicts from the cache
    final LRUQueryCache queryCache = new LRUQueryCache(1, 10000, context -> true);
    final IndexSearcher searcher = newSearcher(reader);
    searcher.setQueryCache(queryCache);
    searcher.setQueryCachingPolicy(QueryCachingPolicy.ALWAYS_CACHE);
    BadQuery query = new BadQuery();
    searcher.count(query);
    // change the hashCode!
    query.i[0] += 1;
    try {
        // trigger an eviction
        searcher.search(new MatchAllDocsQuery(), new TotalHitCountCollector());
        fail();
    } catch (ConcurrentModificationException e) {
    // expected
    } catch (RuntimeException e) {
        // expected: wrapped when executor is in use
        Throwable cause = e.getCause();
        assertTrue(cause instanceof ExecutionException);
        assertTrue(cause.getCause() instanceof ConcurrentModificationException);
    }
    IOUtils.close(w, reader, dir);
}