Examples with PartitionedRegion org.apache.geode.internal.cache.PartitionedRegion used on opensource projects

Example 76 with PartitionedRegion

use of org.apache.geode.internal.cache.PartitionedRegion in project geode by apache.

the class RebalanceOperationDUnitTest method moveBucketsWithUnrecoveredValuesRedundancy.

/**
   * Test to ensure that we wait for in progress write operations before moving a primary.
   * 
   * @throws CancellationException
   */
public void moveBucketsWithUnrecoveredValuesRedundancy(final boolean simulate) {
    Host host = Host.getHost(0);
    VM vm0 = host.getVM(0);
    VM vm1 = host.getVM(1);
    SerializableRunnable createPrRegion = new SerializableRunnable("createRegion") {

        public void run() {
            System.setProperty(DiskStoreImpl.RECOVER_VALUE_PROPERTY_NAME, "false");
            try {
                Cache cache = getCache();
                if (cache.findDiskStore("store") == null) {
                    cache.createDiskStoreFactory().setDiskDirs(getDiskDirs()).setMaxOplogSize(1).create("store");
                }
                AttributesFactory attr = new AttributesFactory();
                PartitionAttributesFactory paf = new PartitionAttributesFactory();
                attr.setDiskStoreName("store");
                attr.setDataPolicy(DataPolicy.PERSISTENT_PARTITION);
                paf.setRedundantCopies(0);
                paf.setRecoveryDelay(-1);
                paf.setStartupRecoveryDelay(-1);
                PartitionAttributes prAttr = paf.create();
                attr.setPartitionAttributes(prAttr);
                attr.setCacheLoader(new Bug40228Loader());
                cache.createRegion("region1", attr.create());
            } finally {
                System.setProperty(DiskStoreImpl.RECOVER_VALUE_PROPERTY_NAME, "true");
            }
        }
    };
    // Create the region in only 1 VM
    vm0.invoke(createPrRegion);
    // Create some buckets
    vm0.invoke(new SerializableRunnable("createSomeBuckets") {

        public void run() {
            Cache cache = getCache();
            Region region = cache.getRegion("region1");
            region.put(Integer.valueOf(1), "A");
            region.put(Integer.valueOf(2), "A");
            region.put(Integer.valueOf(3), "A");
            region.put(Integer.valueOf(4), "A");
            region.put(Integer.valueOf(5), "A");
            region.put(Integer.valueOf(6), "A");
        }
    });
    final long[] bucketSizes = (long[]) vm0.invoke(new SerializableCallable("get sizes and close cache") {

        public Object call() {
            PartitionedRegion region = (PartitionedRegion) getCache().getRegion("region1");
            PartitionedRegionDataStore dataStore = region.getDataStore();
            long[] bucketSizes = new long[7];
            for (int i = 1; i <= 6; i++) {
                BucketRegion bucket = dataStore.getLocalBucketById(i);
                bucketSizes[i] = bucket.getTotalBytes();
                assertEquals(0, bucket.getNumOverflowBytesOnDisk());
                assertEquals(0, bucket.getNumOverflowOnDisk());
                assertEquals(1, bucket.getNumEntriesInVM());
            }
            getCache().close();
            return bucketSizes;
        }
    });
    // now recover the region
    vm0.invoke(createPrRegion);
    vm0.invoke(new SerializableRunnable("check sizes") {

        public void run() {
            PartitionedRegion region = (PartitionedRegion) getCache().getRegion("region1");
            PartitionedRegionDataStore dataStore = region.getDataStore();
            for (int i = 1; i <= 6; i++) {
                BucketRegion bucket = dataStore.getLocalBucketById(i);
                assertEquals(1, bucket.getNumOverflowOnDisk());
                assertEquals(0, bucket.getNumEntriesInVM());
                // the size recorded on disk is not the same is the in memory size, apparently
                assertTrue("Bucket size was " + bucket.getNumOverflowBytesOnDisk(), 1 < bucket.getNumOverflowBytesOnDisk());
                assertEquals(bucket.getNumOverflowBytesOnDisk(), bucket.getTotalBytes());
            }
        }
    });
    // Create the region in the other VM (should have no effect)
    vm1.invoke(createPrRegion);
    // Now simulate a rebalance
    vm0.invoke(new SerializableRunnable("simulateRebalance") {

        public void run() {
            Cache cache = getCache();
            ResourceManager manager = cache.getResourceManager();
            RebalanceResults results = doRebalance(simulate, manager);
            assertEquals(0, results.getTotalBucketCreatesCompleted());
            assertEquals(0, results.getTotalPrimaryTransfersCompleted());
            assertEquals(3, results.getTotalBucketTransfersCompleted());
            assertTrue("Transfered Bytes = " + results.getTotalBucketTransferBytes(), 0 < results.getTotalBucketTransferBytes());
            Set<PartitionRebalanceInfo> detailSet = results.getPartitionRebalanceDetails();
            assertEquals(1, detailSet.size());
            PartitionRebalanceInfo details = detailSet.iterator().next();
            assertEquals(0, details.getBucketCreatesCompleted());
            assertEquals(0, details.getPrimaryTransfersCompleted());
            assertTrue(0 < details.getBucketTransferBytes());
            assertEquals(3, details.getBucketTransfersCompleted());
            Set<PartitionMemberInfo> afterDetails = details.getPartitionMemberDetailsAfter();
            assertEquals(2, afterDetails.size());
            for (PartitionMemberInfo memberDetails : afterDetails) {
                assertEquals(3, memberDetails.getBucketCount());
                assertEquals(3, memberDetails.getPrimaryCount());
            }
            if (!simulate) {
                verifyStats(manager, results);
            }
        }
    });
    if (!simulate) {
        SerializableRunnable checkRedundancyFixed = new SerializableRunnable("checkRedundancyFixed") {

            public void run() {
                Cache cache = getCache();
                Region region = cache.getRegion("region1");
                PartitionRegionInfo details = PartitionRegionHelper.getPartitionRegionInfo(region);
                assertEquals(6, details.getCreatedBucketCount());
                assertEquals(0, details.getActualRedundantCopies());
                assertEquals(0, details.getLowRedundancyBucketCount());
                assertEquals(2, details.getPartitionMemberInfo().size());
                for (PartitionMemberInfo memberDetails : details.getPartitionMemberInfo()) {
                    assertEquals(3, memberDetails.getBucketCount());
                    assertEquals(3, memberDetails.getPrimaryCount());
                }
                // check to make sure that moving buckets didn't close the cache loader
                Bug40228Loader loader = (Bug40228Loader) cache.getRegion("region1").getAttributes().getCacheLoader();
                assertFalse(loader.isClosed());
            }
        };
        vm0.invoke(checkRedundancyFixed);
        vm1.invoke(checkRedundancyFixed);
        SerializableRunnable checkBug40228Fixed = new SerializableRunnable("checkBug40228Fixed") {

            public void run() {
                Cache cache = getCache();
                Bug40228Loader loader = (Bug40228Loader) cache.getRegion("region1").getAttributes().getCacheLoader();
                assertFalse(loader.isClosed());
                // check to make sure that closing the PR closes the cache loader
                cache.getRegion("region1").close();
                assertTrue(loader.isClosed());
            }
        };
        vm0.invoke(checkBug40228Fixed);
        vm1.invoke(checkBug40228Fixed);
    }
}

Example 77 with PartitionedRegion

use of org.apache.geode.internal.cache.PartitionedRegion in project geode by apache.

the class RebalanceOperationDUnitTest method testRecoverRedundancyBalancingIfCreateBucketFails.

@Test
public void testRecoverRedundancyBalancingIfCreateBucketFails() {
    Host host = Host.getHost(0);
    VM vm0 = host.getVM(0);
    VM vm1 = host.getVM(1);
    VM vm2 = host.getVM(2);
    final DistributedMember member1 = createPrRegion(vm0, "region1", 100, null);
    vm0.invoke(new SerializableRunnable("createSomeBuckets") {

        public void run() {
            Cache cache = getCache();
            Region region = cache.getRegion("region1");
            for (int i = 0; i < 1; i++) {
                region.put(Integer.valueOf(i), "A");
            }
        }
    });
    SerializableRunnable checkRedundancy = new SerializableRunnable("checkRedundancy") {

        public void run() {
            Cache cache = getCache();
            Region region = cache.getRegion("region1");
            PartitionRegionInfo details = PartitionRegionHelper.getPartitionRegionInfo(region);
            assertEquals(1, details.getCreatedBucketCount());
            assertEquals(0, details.getActualRedundantCopies());
            assertEquals(1, details.getLowRedundancyBucketCount());
        }
    };
    vm0.invoke(checkRedundancy);
    // Now create the region in 2 more VMs
    // Let localMaxMemory(VM1) > localMaxMemory(VM2)
    // so that redundant bucket will always be attempted on VM1
    final DistributedMember member2 = createPrRegion(vm1, "region1", 100, null);
    final DistributedMember member3 = createPrRegion(vm2, "region1", 90, null);
    vm0.invoke(checkRedundancy);
    // Inject mock PRHARedundancyProvider to simulate createBucketFailures
    vm0.invoke(new SerializableRunnable("injectCreateBucketFailureAndRebalance") {

        @Override
        public void run() {
            GemFireCacheImpl cache = spy(getGemfireCache());
            // set the spied cache instance
            GemFireCacheImpl origCache = GemFireCacheImpl.setInstanceForTests(cache);
            PartitionedRegion origRegion = (PartitionedRegion) cache.getRegion("region1");
            PartitionedRegion spyRegion = spy(origRegion);
            PRHARedundancyProvider redundancyProvider = spy(new PRHARedundancyProvider(spyRegion));
            // return the spied region when ever getPartitionedRegions() is invoked
            Set<PartitionedRegion> parRegions = cache.getPartitionedRegions();
            parRegions.remove(origRegion);
            parRegions.add(spyRegion);
            doReturn(parRegions).when(cache).getPartitionedRegions();
            doReturn(redundancyProvider).when(spyRegion).getRedundancyProvider();
            // simulate create bucket fails on member2 and test if it creates on member3
            doReturn(false).when(redundancyProvider).createBackupBucketOnMember(anyInt(), eq((InternalDistributedMember) member2), anyBoolean(), anyBoolean(), any(), anyBoolean());
            // Now simulate a rebalance
            // Create operationImpl and not factory as we need spied cache to be passed to operationImpl
            RegionFilter filter = new FilterByPath(null, null);
            RebalanceOperationImpl operation = new RebalanceOperationImpl(cache, false, filter);
            operation.start();
            RebalanceResults results = null;
            try {
                results = operation.getResults(MAX_WAIT, TimeUnit.SECONDS);
            } catch (InterruptedException e) {
                Assert.fail("Interrupted waiting on rebalance", e);
            } catch (TimeoutException e) {
                Assert.fail("Timeout waiting on rebalance", e);
            }
            assertEquals(1, results.getTotalBucketCreatesCompleted());
            assertEquals(0, results.getTotalPrimaryTransfersCompleted());
            assertEquals(0, results.getTotalBucketTransferBytes());
            assertEquals(0, results.getTotalBucketTransfersCompleted());
            Set<PartitionRebalanceInfo> detailSet = results.getPartitionRebalanceDetails();
            assertEquals(1, detailSet.size());
            PartitionRebalanceInfo details = detailSet.iterator().next();
            assertEquals(1, details.getBucketCreatesCompleted());
            assertEquals(0, details.getPrimaryTransfersCompleted());
            assertEquals(0, details.getBucketTransferBytes());
            assertEquals(0, details.getBucketTransfersCompleted());
            Set<PartitionMemberInfo> afterDetails = details.getPartitionMemberDetailsAfter();
            assertEquals(3, afterDetails.size());
            for (PartitionMemberInfo memberDetails : afterDetails) {
                if (memberDetails.getDistributedMember().equals(member1)) {
                    assertEquals(1, memberDetails.getBucketCount());
                    assertEquals(1, memberDetails.getPrimaryCount());
                } else if (memberDetails.getDistributedMember().equals(member2)) {
                    assertEquals(0, memberDetails.getBucketCount());
                    assertEquals(0, memberDetails.getPrimaryCount());
                } else if (memberDetails.getDistributedMember().equals(member3)) {
                    assertEquals(1, memberDetails.getBucketCount());
                    assertEquals(0, memberDetails.getPrimaryCount());
                }
            }
            ResourceManagerStats stats = cache.getInternalResourceManager().getStats();
            assertEquals(0, stats.getRebalancesInProgress());
            assertEquals(1, stats.getRebalancesCompleted());
            assertEquals(0, stats.getRebalanceBucketCreatesInProgress());
            assertEquals(results.getTotalBucketCreatesCompleted(), stats.getRebalanceBucketCreatesCompleted());
            assertEquals(1, stats.getRebalanceBucketCreatesFailed());
            // set the original cache
            GemFireCacheImpl.setInstanceForTests(origCache);
        }
    });
    SerializableRunnable checkRedundancyFixed = new SerializableRunnable("checkLowRedundancy") {

        public void run() {
            Cache cache = getCache();
            Region region = cache.getRegion("region1");
            PartitionRegionInfo details = PartitionRegionHelper.getPartitionRegionInfo(region);
            assertEquals(1, details.getCreatedBucketCount());
            assertEquals(1, details.getActualRedundantCopies());
            assertEquals(0, details.getLowRedundancyBucketCount());
        }
    };
    vm0.invoke(checkRedundancyFixed);
    vm1.invoke(checkRedundancyFixed);
    vm2.invoke(checkRedundancyFixed);
}

Example 78 with PartitionedRegion

use of org.apache.geode.internal.cache.PartitionedRegion in project geode by apache.

the class RebalanceOperationDUnitTest method moveBucketsColocatedRegions.

/**
   * Test to make sure that we move buckets to balance between three hosts with a redundancy of 1
   * and two colocated regions. Makes sure that the buckets stay colocated when we move them.
   * 
   * @param simulate
   */
public void moveBucketsColocatedRegions(final boolean simulate) {
    Host host = Host.getHost(0);
    VM vm0 = host.getVM(0);
    VM vm1 = host.getVM(1);
    VM vm2 = host.getVM(2);
    createPrRegion(vm0, "region1", 200, null);
    createPrRegion(vm0, "region2", 200, "region1");
    createPrRegion(vm1, "region1", 200, null);
    createPrRegion(vm1, "region2", 200, "region1");
    // Create some buckets.
    vm0.invoke(new SerializableRunnable("createSomeBuckets") {

        public void run() {
            Cache cache = getCache();
            Region region = cache.getRegion("region1");
            Region region2 = cache.getRegion("region2");
            for (int i = 0; i < 12; i++) {
                region.put(Integer.valueOf(i), "A");
                region2.put(Integer.valueOf(i), "A");
            }
        }
    });
    // create the leader region, but not the colocated
    // region in one of the VMs.
    createPrRegion(vm2, "region1", 200, null);
    // Simulate a rebalance, and make sure we don't
    // move any buckets yet, because we don't have
    // the colocated region in the new VMs.
    vm0.invoke(new SerializableRunnable("rebalance") {

        public void run() {
            Cache cache = getCache();
            ResourceManager manager = cache.getResourceManager();
            RebalanceResults results = doRebalance(simulate, manager);
            assertEquals(0, results.getTotalBucketCreatesCompleted());
            assertEquals(0, results.getTotalPrimaryTransfersCompleted());
            assertEquals(0, results.getTotalBucketTransferBytes());
            assertEquals(0, results.getTotalBucketTransfersCompleted());
            Set<PartitionRebalanceInfo> detailSet = results.getPartitionRebalanceDetails();
            assertEquals(2, detailSet.size());
            for (PartitionRebalanceInfo details : detailSet) {
                assertEquals(0, details.getBucketCreatesCompleted());
                assertEquals(0, details.getPrimaryTransfersCompleted());
                assertEquals(0, details.getBucketTransferBytes());
                assertEquals(0, details.getBucketTransfersCompleted());
            }
        }
    });
    // now create the colocated region in the last VM.
    createPrRegion(vm2, "region2", 200, "region1");
    vm0.invoke(new SerializableRunnable("rebalance") {

        public void run() {
            Cache cache = getCache();
            ResourceManager manager = cache.getResourceManager();
            RebalanceResults results = doRebalance(simulate, manager);
            assertEquals(0, results.getTotalBucketCreatesCompleted());
            assertEquals(16, results.getTotalBucketTransfersCompleted());
            assertTrue(0 < results.getTotalBucketTransferBytes());
            Set<PartitionRebalanceInfo> detailSet = results.getPartitionRebalanceDetails();
            assertEquals(2, detailSet.size());
            for (PartitionRebalanceInfo details : detailSet) {
                assertEquals(0, details.getBucketCreatesCompleted());
                assertTrue(0 < details.getBucketTransferBytes());
                assertEquals(8, details.getBucketTransfersCompleted());
                Set<PartitionMemberInfo> afterDetails = details.getPartitionMemberDetailsAfter();
                assertEquals(3, afterDetails.size());
                for (PartitionMemberInfo memberDetails : afterDetails) {
                    assertEquals(8, memberDetails.getBucketCount());
                    assertEquals(4, memberDetails.getPrimaryCount());
                }
            }
        }
    });
    if (!simulate) {
        SerializableRunnable checkRedundancyFixed = new SerializableRunnable("checkLowRedundancy") {

            public void run() {
                Cache cache = getCache();
                PartitionedRegion region1 = (PartitionedRegion) cache.getRegion("region1");
                PartitionedRegion region2 = (PartitionedRegion) cache.getRegion("region2");
                ResourceManager manager = cache.getResourceManager();
                PartitionRegionInfo details = PartitionRegionHelper.getPartitionRegionInfo(cache.getRegion("region1"));
                assertEquals(12, details.getCreatedBucketCount());
                assertEquals(1, details.getActualRedundantCopies());
                assertEquals(0, details.getLowRedundancyBucketCount());
                details = PartitionRegionHelper.getPartitionRegionInfo(cache.getRegion("region2"));
                assertEquals(12, details.getCreatedBucketCount());
                assertEquals(1, details.getActualRedundantCopies());
                assertEquals(0, details.getLowRedundancyBucketCount());
                assertEquals(region1.getLocalPrimaryBucketsListTestOnly(), region2.getLocalPrimaryBucketsListTestOnly());
                assertEquals(region1.getLocalBucketsListTestOnly(), region2.getLocalBucketsListTestOnly());
            }
        };
        vm0.invoke(checkRedundancyFixed);
        vm1.invoke(checkRedundancyFixed);
        vm2.invoke(checkRedundancyFixed);
    }
}

Example 79 with PartitionedRegion

use of org.apache.geode.internal.cache.PartitionedRegion in project geode by apache.

the class RebalanceOperationDUnitTest method recoverRedundancyParallelAsyncEventQueue.

public void recoverRedundancyParallelAsyncEventQueue(final boolean simulate) {
    Host host = Host.getHost(0);
    VM vm0 = host.getVM(0);
    VM vm1 = host.getVM(1);
    VM vm2 = host.getVM(2);
    final DistributedMember member1 = createPRRegionWithAsyncQueue(vm0, 200);
    // Create some buckets. Put enough data to cause the queue to overflow (more than 1 MB)
    vm0.invoke(new SerializableRunnable("createSomeBuckets") {

        public void run() {
            Cache cache = getCache();
            Region region = cache.getRegion("region1");
            Region region2 = cache.getRegion("region2");
            for (int i = 0; i < 12; i++) {
                region.put(Integer.valueOf(i), "A", new byte[1024 * 512]);
            }
            // GEODE-244 - the async event queue uses asnychronous writes. Flush
            // the default disk store to make sure all values have overflowed
            cache.findDiskStore(null).flush();
        }
    });
    // check to make sure our redundancy is impaired
    SerializableRunnable checkLowRedundancy = new SerializableRunnable("checkLowRedundancy") {

        public void run() {
            Cache cache = getCache();
            Region region = cache.getRegion("region1");
            PartitionRegionInfo details = PartitionRegionHelper.getPartitionRegionInfo(region);
            assertEquals(12, details.getCreatedBucketCount());
            assertEquals(0, details.getActualRedundantCopies());
            assertEquals(12, details.getLowRedundancyBucketCount());
            // Get the async event queue region (It's a colocated region)
            PartitionedRegion region2 = ColocationHelper.getColocatedChildRegions((PartitionedRegion) region).get(0);
            details = PartitionRegionHelper.getPartitionRegionInfo(region2);
            assertEquals(12, details.getCreatedBucketCount());
            assertEquals(0, details.getActualRedundantCopies());
            assertEquals(12, details.getLowRedundancyBucketCount());
            AsyncEventQueue queue = cache.getAsyncEventQueue("parallelQueue");
            assertEquals(12, queue.size());
        }
    };
    vm0.invoke(checkLowRedundancy);
    // Create the region on two more members, each with 1/2 of the memory
    createPRRegionWithAsyncQueue(vm1, 100);
    createPRRegionWithAsyncQueue(vm2, 100);
    vm0.invoke(checkLowRedundancy);
    // Now simulate a rebalance
    vm0.invoke(new SerializableRunnable("rebalance") {

        public void run() {
            Cache cache = getCache();
            ResourceManager manager = cache.getResourceManager();
            RebalanceResults results = doRebalance(simulate, manager);
            assertEquals(24, results.getTotalBucketCreatesCompleted());
            assertEquals(12, results.getTotalPrimaryTransfersCompleted());
            assertEquals(0, results.getTotalBucketTransferBytes());
            assertEquals(0, results.getTotalBucketTransfersCompleted());
            Set<PartitionRebalanceInfo> detailSet = results.getPartitionRebalanceDetails();
            assertEquals(2, detailSet.size());
            for (PartitionRebalanceInfo details : detailSet) {
                assertEquals(12, details.getBucketCreatesCompleted());
                assertEquals(6, details.getPrimaryTransfersCompleted());
                assertEquals(0, details.getBucketTransferBytes());
                assertEquals(0, details.getBucketTransfersCompleted());
                Set<PartitionMemberInfo> afterDetails = details.getPartitionMemberDetailsAfter();
                assertEquals(3, afterDetails.size());
                for (PartitionMemberInfo memberDetails : afterDetails) {
                    if (memberDetails.getDistributedMember().equals(member1)) {
                        assertEquals(12, memberDetails.getBucketCount());
                        assertEquals(6, memberDetails.getPrimaryCount());
                    } else {
                        assertEquals(6, memberDetails.getBucketCount());
                        assertEquals(3, memberDetails.getPrimaryCount());
                    }
                }
                if (!simulate) {
                    verifyStats(manager, results);
                }
            }
        }
    });
    if (!simulate) {
        SerializableRunnable checkRedundancyFixed = new SerializableRunnable("checkLowRedundancy") {

            public void run() {
                Cache cache = getCache();
                PartitionedRegion region1 = (PartitionedRegion) cache.getRegion("region1");
                // Get the async event queue region (It's a colocated region)
                PartitionedRegion region2 = ColocationHelper.getColocatedChildRegions(region1).get(0);
                PartitionRegionInfo details = PartitionRegionHelper.getPartitionRegionInfo(cache.getRegion("region1"));
                assertEquals(12, details.getCreatedBucketCount());
                assertEquals(1, details.getActualRedundantCopies());
                assertEquals(0, details.getLowRedundancyBucketCount());
                details = PartitionRegionHelper.getPartitionRegionInfo(region2);
                assertEquals(12, details.getCreatedBucketCount());
                assertEquals(1, details.getActualRedundantCopies());
                assertEquals(0, details.getLowRedundancyBucketCount());
                assertEquals(region1.getLocalPrimaryBucketsListTestOnly(), region2.getLocalPrimaryBucketsListTestOnly());
                assertEquals(region1.getLocalBucketsListTestOnly(), region2.getLocalBucketsListTestOnly());
            }
        };
        vm0.invoke(checkRedundancyFixed);
        vm1.invoke(checkRedundancyFixed);
        vm2.invoke(checkRedundancyFixed);
    }
}

Example 80 with PartitionedRegion

use of org.apache.geode.internal.cache.PartitionedRegion in project geode by apache.

the class RebalanceOperationDUnitTest method waitForBucketList.

private void waitForBucketList(final String regionName, VM vm0, final Collection<Integer> expected) {
    SerializableCallable getBuckets = new SerializableCallable("get buckets") {

        public Object call() throws Exception {
            Cache cache = getCache();
            final PartitionedRegion region = (PartitionedRegion) cache.getRegion(regionName);
            Wait.waitForCriterion(new WaitCriterion() {

                @Override
                public boolean done() {
                    TreeSet<Integer> results = getBuckets();
                    return results.equals(expected);
                }

                protected TreeSet<Integer> getBuckets() {
                    TreeSet<Integer> results = new TreeSet<Integer>(region.getDataStore().getAllLocalBucketIds());
                    return results;
                }

                @Override
                public String description() {
                    return "Timeout waiting for buckets to match. Expected " + expected + " but got " + getBuckets();
                }
            }, 60000, 100, true);
            return null;
        }
    };
    vm0.invoke(getBuckets);
}