seo – Rich Snippet The last thread of Ariane does not appear in the search results

I'm struggling with rich extract for breadcrumbs and how these appear in Google's SERP

The code passes the Google Data Structure test. In the Google search results page, I see a rich snippet for my website when an Ariane thread is on this page.

I see this https://www.example.com> Collections

I'm trying to get this

but that would be https://www.example.com> Collections> Item3

I've tried to add

Item3

Can we avoid that the last thread of Ariane is a link on the web page?
Or is the only way to make a link with a code similar to the way content = "1" and content = "2"
edit: I just tried to transform the last thread of Ariane into a link and with the search console to update the SERP, but that still does not show item3

the solution I am looking for should not be JSON-LD

Exception in the CompactionExecutor thread – Cassandra

I have a Cassandra key space whose tables are partitioned by a string that results from the concatenation of the current year and month. In most tables, there are no problems, but one of them has partitions of more or less 40 GB. I do not know if these partitions are too big, but when Cassandra performs automatic compaction tasks, a strange exception is issued:

ERROR (CompactionExecutor:1811) 2019-08-13 13:48:46,384 CassandraDaemon.java:228 - Exception in thread Thread(CompactionExecutor:1811,1,main)
java.lang.RuntimeException: null
    at org.apache.cassandra.io.util.DataOutputBuffer.validateReallocation(DataOutputBuffer.java:134) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.io.util.DataOutputBuffer.calculateNewSize(DataOutputBuffer.java:152) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.io.util.DataOutputBuffer.expandToFit(DataOutputBuffer.java:159) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.io.util.DataOutputBuffer.doFlush(DataOutputBuffer.java:119) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.io.util.BufferedDataOutputStreamPlus.write(BufferedDataOutputStreamPlus.java:195) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.io.util.BufferedDataOutputStreamPlus.writeUnsignedVInt(BufferedDataOutputStreamPlus.java:258) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.utils.ByteBufferUtil.writeWithVIntLength(ByteBufferUtil.java:295) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.marshal.AbstractType.writeValue(AbstractType.java:413) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.ClusteringPrefix$Serializer.serializeValuesWithoutSize(ClusteringPrefix.java:317) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.Clustering$Serializer.serialize(Clustering.java:131) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.ClusteringPrefix$Serializer.serialize(ClusteringPrefix.java:260) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.Serializers$NewFormatSerializer.serialize(Serializers.java:167) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.Serializers$NewFormatSerializer.serialize(Serializers.java:154) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.io.sstable.IndexInfo$Serializer.serialize(IndexInfo.java:103) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.io.sstable.IndexInfo$Serializer.serialize(IndexInfo.java:82) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.ColumnIndex.addIndexBlock(ColumnIndex.java:216) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.ColumnIndex.add(ColumnIndex.java:264) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.ColumnIndex.buildRowIndex(ColumnIndex.java:111) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.io.sstable.format.big.BigTableWriter.append(BigTableWriter.java:173) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.io.sstable.SSTableRewriter.append(SSTableRewriter.java:135) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.compaction.writers.DefaultCompactionWriter.realAppend(DefaultCompactionWriter.java:65) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.compaction.writers.CompactionAwareWriter.append(CompactionAwareWriter.java:142) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.compaction.CompactionTask.runMayThrow(CompactionTask.java:201) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:85) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:61) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:266) ~(apache-cassandra-3.11.4.jar:3.11.4)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~(na:1.8.0_222)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~(na:1.8.0_222)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~(na:1.8.0_222)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) (na:1.8.0_222)
    at org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:81) (apache-cassandra-3.11.4.jar:3.11.4)
    at java.lang.Thread.run(Thread.java:748) ~(na:1.8.0_222)

The compaction strategy is org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy

Any ideas on what could be the problem?

Thank you so much. Cordially.

unit testing – C # AsyncDictionary – Can you break thread security?

This class is an Async / Await wrapped dictionary. Of course, this does not technically implement IDictionary, but the features are basically the same as those of an IDictionary. It offers features similar to ConcurrentDictionary but with async / wait and is non-blocking.

The code is here

public class AsyncDictionary : IAsyncDictionary, IDisposable
    {
        #region Fields
        private readonly IDictionary _dictionary;
        private readonly SemaphoreSlim _semaphoreSlim = new SemaphoreSlim(1, 1);
        private bool disposedValue = false;
        #endregion

        #region Func
        private static readonly Func, KeyValuePair, Task> ContainsKeyFunc = new Func, KeyValuePair, Task>((dictionary, keyValuePair) =>
        {
            return Task.FromResult(dictionary.ContainsKey(keyValuePair.Key));
        });

        private static readonly Func, KeyValuePair, Task> ClearFunc = new Func, KeyValuePair, Task>((dictionary, keyValuePair) =>
       {
           dictionary.Clear();
           return Task.FromResult(true);
       });

        private static readonly Func, KeyValuePair, Task> GetCountFunc = new Func, KeyValuePair, Task>((dictionary, keyValuePair) =>
       {
           return Task.FromResult(dictionary.Count);
       });

        private static readonly Func, KeyValuePair, Task>> GetValuesFunc = new Func, KeyValuePair, Task>>((dictionary, keyValuePair) =>
       {
           return Task.FromResult(dictionary.Values);
       });

        private static readonly Func, KeyValuePair, Task>> GetKeysFunc = new Func, KeyValuePair, Task>>((dictionary, keyValuePair) =>
       {
           return Task.FromResult(dictionary.Keys);
       });

        private static readonly Func, KeyValuePair, Task> AddFunc = new Func, KeyValuePair, Task>((dictionary, keyValuePair) =>
       {
           dictionary.Add(keyValuePair);
           return Task.FromResult(true);
       });

        private static readonly Func, KeyValuePair, Task> AddOrReplaceFunc = new Func, KeyValuePair, Task>((dictionary, keyValuePair) =>
       {
           if (dictionary.ContainsKey(keyValuePair.Key))
           {
               dictionary(keyValuePair.Key) = keyValuePair.Value;
           }
           else
           {
               dictionary.Add(keyValuePair.Key, keyValuePair.Value);
           }

           return Task.FromResult(true);
       });

        private static readonly Func, KeyValuePair, Task> ContainsItemFunc = new Func, KeyValuePair, Task>((dictionary, keyValuePair) =>
       {
           return Task.FromResult(dictionary.Contains(keyValuePair));
       });

        private static readonly Func, KeyValuePair, Task> RemoveFunc = new Func, KeyValuePair, Task>((dictionary, keyValuePair) =>
       {
           return Task.FromResult(dictionary.Remove(keyValuePair));
       });

        private static readonly Func, KeyValuePair, Task> RemoveByKeyFunc = new Func, KeyValuePair, Task>((dictionary, keyValuePair) =>
       {
           return Task.FromResult(dictionary.Remove(keyValuePair.Key));
       });

        private static readonly Func, KeyValuePair, Task> GetValueFunc = new Func, KeyValuePair, Task>((dictionary, keyValuePair) =>
       {
           return Task.FromResult(dictionary(keyValuePair.Key));
       });
        #endregion

        #region Constructor
        public AsyncDictionary()
        {
            //Note: the constructor overload to allow passing in a different Dictionary type has been removed to disallow unsynchronized access. It can be added if you're careful.
            _dictionary = new Dictionary();
        }

        /// 
        /// This overload is used in cases where a standard Dictionary isn't the right choice. Warning: accessing the Dictionary outside this class will break synchronization
        /// 
        //public AsyncDictionary(IDictionary dictionary)
        //{
        //    _dictionary = dictionary;
        //}
        #endregion

        #region Implementation
        //Only when C# 8 comes!
        //TODO: IEnumerator> GetEnumerator()
        //TODO: IEnumerator IEnumerable.GetEnumerator()

        public Task> GetKeysAsync()
        {
            return CallSynchronizedAsync(GetKeysFunc, default);
        }

        public Task> GetValuesAsync()
        {
            return CallSynchronizedAsync(GetValuesFunc, default);
        }

        public Task GetCountAsync()
        {
            return CallSynchronizedAsync(GetCountFunc, default);
        }

        public Task AddAsync(TKey key, TValue value)
        {
            return CallSynchronizedAsync(AddFunc, new KeyValuePair(key, value));
        }

        public Task AddAsync(KeyValuePair item)
        {
            return CallSynchronizedAsync(AddFunc, item);
        }

        public Task AddOrReplaceAsync(TKey key, TValue value)
        {
            return CallSynchronizedAsync(AddOrReplaceFunc, new KeyValuePair(key, value));
        }

        public Task ClearAsync()
        {
            return CallSynchronizedAsync(ClearFunc, default);
        }

        public Task GetContainsAsync(KeyValuePair item)
        {
            return CallSynchronizedAsync(ContainsItemFunc, item);
        }

        public Task GetContainsKeyAsync(TKey key)
        {
            return CallSynchronizedAsync(ContainsKeyFunc, new KeyValuePair(key, default));
        }

        public Task RemoveAsync(TKey key)
        {
            return CallSynchronizedAsync(RemoveByKeyFunc, new KeyValuePair(key, default));
        }

        public Task RemoveAsync(KeyValuePair item)
        {
            return CallSynchronizedAsync(RemoveFunc, item);
        }

        public Task GetValueAsync(TKey key)
        {
            return CallSynchronizedAsync(GetValueFunc, new KeyValuePair(key, default));
        }
        #endregion

        #region Private Methods
        private async Task CallSynchronizedAsync(Func, KeyValuePair, Task> func, KeyValuePair keyValuePair)
        {
            try
            {
                await _semaphoreSlim.WaitAsync();

                return await Task.Run(async () =>
                {
                    return await func(_dictionary, keyValuePair);
                });
            }
            finally
            {
                _semaphoreSlim.Release();
            }
        }
        #endregion

        #region IDisposable Support
        protected virtual void Dispose(bool disposing)
        {
            if (!disposedValue)
            {
                if (disposing)
                {
                    _semaphoreSlim.Dispose();
                }

                disposedValue = true;
            }
        }

        public void Dispose()
        {
            Dispose(true);
        }
        #endregion
    }

I've put up some unit tests here, but I'd like to see if anyone can break the thread's safety from this task.

Can you add to unit tests? Can you make the dictionary return bad results? Can you cause an exception that should not arise from normal use of this class? Can you detect other competition issues? Can find other bugs

Note: RPs are more than welcome and the more unit tests there are, the better!

The code is here

public class AsyncDictionaryTests
    {
        #region Fields
        private const int max = 800;
        #endregion

        #region Tests
        (Test)
        public async Task TestAddAndRetrieveKeys()
        {
            var asyncDictionary = new AsyncDictionary();
            const int key = 1;
            await asyncDictionary.AddAsync(key, key.ToString());
            var keys = (await asyncDictionary.GetKeysAsync()).ToList();
            Assert.AreEqual(key, keys(0));
        }

        (Test)
        public async Task TestAddAndRetrieveValues()
        {
            var asyncDictionary = new AsyncDictionary();
            const int key = 1;
            var value = key.ToString();
            await asyncDictionary.AddAsync(key, value);
            var values = (await asyncDictionary.GetValuesAsync()).ToList();
            Assert.AreEqual(value, values(0).ToString());
        }

        (Test)
        public async Task TestContainsKey()
        {
            var asyncDictionary = new AsyncDictionary();
            const int key = 1;
            await asyncDictionary.AddAsync(key, key.ToString());
            var contains = await asyncDictionary.GetContainsKeyAsync(key);
            Assert.True(contains);
        }


        (Test)
        public async Task TestContains()
        {
            var asyncDictionary = new AsyncDictionary();
            const int key = 1;
            var value = key.ToString();
            var kvp = new KeyValuePair(key, value);
            await asyncDictionary.AddAsync(kvp);
            var contains = await asyncDictionary.GetContainsAsync(kvp);
            Assert.True(contains);
        }

        (Test)
        public async Task TestRemoveByKey()
        {
            var asyncDictionary = new AsyncDictionary();
            const int key = 1;
            await asyncDictionary.AddAsync(key, key.ToString());
            var contains = await asyncDictionary.GetContainsKeyAsync(key);
            Assert.True(contains);
            await asyncDictionary.RemoveAsync(key);
            contains = await asyncDictionary.GetContainsKeyAsync(key);
            Assert.False(contains);
        }

        (Test)
        public async Task TestRemove()
        {
            var asyncDictionary = new AsyncDictionary();
            const int key = 1;
            var kvp = new KeyValuePair(key, key.ToString());
            await asyncDictionary.AddAsync(kvp);
            var contains = await asyncDictionary.GetContainsKeyAsync(key);
            Assert.True(contains);
            await asyncDictionary.RemoveAsync(kvp);
            contains = await asyncDictionary.GetContainsKeyAsync(key);
            Assert.False(contains);
        }

        (Test)
        public async Task TestGetValue()
        {
            var asyncDictionary = new AsyncDictionary();
            const int key = 1;
            await asyncDictionary.AddAsync(key, key.ToString());
            var value = await asyncDictionary.GetValueAsync(key);
            Assert.AreEqual(key.ToString(), value);
        }

        (Test)
        public async Task TestClear()
        {
            var asyncDictionary = new AsyncDictionary();
            const int key = 1;
            var value = key.ToString();
            await asyncDictionary.AddAsync(key, value);
            await asyncDictionary.ClearAsync();
            var values = (await asyncDictionary.GetValuesAsync()).ToList();
            Assert.IsEmpty(values);
        }

        (Test)
        public async Task TestAnotherType()
        {
            var asyncDictionary = new AsyncDictionary();
            var thing = new Thing { Name="test", Size=100 };
            await asyncDictionary.AddAsync(thing.Name, thing);
            var newthing = await asyncDictionary.GetValueAsync(thing.Name);
            Assert.True(ReferenceEquals(thing, newthing));
        }

        (Test)
        public async Task TestThreadSafety()
        {
            var asyncDictionary = new AsyncDictionary();

            var tasks = new List { AddKeyValuePairsAsync(asyncDictionary), asyncDictionary.ClearAsync(), AddKeyValuePairsAsync(asyncDictionary) };

            await Task.WhenAll(tasks);

            tasks = new List { AddKeyValuePairsAsync(asyncDictionary), AddKeyValuePairsAsync(asyncDictionary), AddKeyValuePairsAsync(asyncDictionary) };

            await Task.WhenAll(tasks);

            tasks = new List { DoTestEquality(asyncDictionary), DoTestEquality(asyncDictionary), DoTestEquality(asyncDictionary), DoTestEquality(asyncDictionary), AddKeyValuePairsAsync(asyncDictionary) };

            await Task.WhenAll(tasks);
        }
        #endregion

        #region Helpers
        private static async Task DoTestEquality(AsyncDictionary asyncDictionary)
        {
            var tasks = new List();
            for (var i = 0; i < max; i++)
            {
                tasks.Add(TestEquality(asyncDictionary, i));
            }

            await Task.WhenAll(tasks);
        }

        private static async Task TestEquality(AsyncDictionary asyncDictionary, int i)
        {
            var expected = i.ToString();
            var actual = await asyncDictionary.GetValueAsync(i);

            Console.WriteLine($"Test Equality Expected: {expected} Actual: {actual}");

            Assert.AreEqual(expected, actual);
        }

        private static async Task AddKeyValuePairsAsync(AsyncDictionary asyncDictionary)
        {
            var tasks = AddSome(asyncDictionary);
            await Task.WhenAll(tasks);
        }

        private static List AddSome(AsyncDictionary asyncDictionary)
        {
            var tasks = new List();
            for (var i = 0; i < max; i++)
            {
                tasks.Add(AddByNumber(asyncDictionary, i));
            }

            return tasks;
        }

        private static Task AddByNumber(AsyncDictionary asyncDictionary, int i)
        {
            return asyncDictionary.AddOrReplaceAsync(i, i.ToString());
        }
        #endregion
    }

To see an example of UWP application, clone the repository and run the sample at that location.

Notes: This class is designed for: maintainability first, simultaneity and flexibility. It is modeled on IDictionary but adopts the paradigm of asynchronous waiting. After years of frustration, he tried to synchronize the cache in asynchronous C # applications while avoiding blocking calls.

It is strongly based on SemaphoreSlim with a maximum query simultaneity of 1. Experience suggests that this class behaves in a FIFO manner. However, the notes on SemaphoreSlim are a little disturbing:

If multiple threads are blocked, no guaranteed order, such as FIFO or LIFO, controls when threads enter the semaphore.

Is it a cure for Achilles? The SemaphoreSlim code can be found here.

Can you create a scenario where the FIFO is not honored in a way that breaks the features of the class?

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foogle Brainstorming Thread

Welcome to the official foogle Brainstorming thread.

What are the latest updates to the Google search algorithm?

Please

so that other readers of this thread can also understand how to use this tool to obtain a better ranking in the search results.

Thank you
Team
Whitevox India

.

Ad network mediation system [Official Thread]

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reddit – Is there a way to open all comments on a big thread without scrolling?

I've already tried changing it in preferences. But I think Reddit has changed the way it handles the number of comments displayed by default.

Is it possible?

I tried to do it by preferences. But that did not work. In Reddit's preferences, there was no option for comments displayed by default.

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