I'm not sure, whether it is a bug or I'm doing something wrong. Here is the code:
using StackExchange.Redis;
ConnectionMultiplexer conn = null;
while (conn == null);
{
try
{
conn = ConnectionMultiplexer.Connect("localhost:6379");
}
catch (Exception)
{
conn = null;
Thread.Sleep(TimeSpan.FromSeconds(5));
}
}
var db = conn.GetDatabase();
var transaction = db.CreateTransaction();
var tasks = new List<Task>();
tasks.Add(transaction.HashSetAsync("key", "field", "value"));
if (transaction.Execute())
{
Task.WaitAll(tasks.ToArray());
}
When I run it with started redis (windows version - 2.6, 2.8.17, 2.8.19), everything works fine. If I start redis after few loops of the cycle, either it doesn't jump into if-statement or it jumps and get blocked on WaitAll(). If I try to check values in redis, they are stored.
This situation happens when we start server and forget to start redis. After postpone start of redis it gets stuck. The same problem appears when using batch instead of transaction.
Am I doing connection to multiplexer wrong or is it bug? (I found few that looked similar but I'm not sure)
It was a bug in older versions of StackExchange.Redis - 1.0.481, 1.0.488 (didn't test any older ones). With new version 1.1.553 it works fine (https://github.com/StackExchange/StackExchange.Redis/issues/200).
Related
Using:
StackExchange.Redis v1.1.608.0
RedLock.net v1.7.4.0
This code always returns false after 250-600ms:
var eps = new [] { new DnsEndPoint("localhost", 6379) };
var lf = new RedisLockFactory(eps);
var resource = "the-thing-we-are-locking-on";
var expiry = TimeSpan.FromSeconds(30);
using (var redisLock = lf.Create(resource, expiry))
{
Response.Write("Lock acquired: " + redisLock.IsAcquired);
}
I'm struggling to work out why, as I'm able to cache things in Redis just fine with StackExchange.Redis connection string localhost,allowAdmin=true.
In the Redis console I can see a client is being connected, but that's as far as it gets.
I've added a firewall rule for port 6379 but nothing changed.
Any ideas on my the lock can never be acquired?
Found the cause of the issue. I'm using MSOpenTech Redis server v3.2.100:
https://github.com/MSOpenTech/redis/releases
Rolling back to v3.0.500 appears to fix the issue. Not ideal, but in testing environment should be OK for now.
This code always fails with a ConcurrencyException:
[Test]
public void EventOrderingCode_Fails_WithConcurrencyException()
{
Guid id = Guid.NewGuid();
using (var scope1 = new TransactionScope())
using (var session = DataAccess.NewOpenSession)
{
session.Advanced.UseOptimisticConcurrency = true;
session.Advanced.AllowNonAuthoritativeInformation = false;
var ent1 = new CTEntity
{
Id = id,
Name = "George"
};
using (var scope2 = new TransactionScope(TransactionScopeOption.RequiresNew))
{
session.Store(ent1);
session.SaveChanges();
scope2.Complete();
}
var ent2 = session.Load<CTEntity>(id);
ent2.Name = "Gina";
session.SaveChanges();
scope1.Complete();
}
}
It fails at the last session.SaveChanges. Stating that it is using a NonCurrent etag. If I use Required instead of RequiresNew for scope2 - i.e. using the same Transaction. It works.
Now, since I load the entity (ent2) it should be using the newest Etag unless this is some cached value attached to scope1 that I am using (but I have disabled Caching). So I do not understand why this fails.
I really need this setup. In the production code the outer TransactionScope is created by NServiceBus, and the inner is for controlling an aspect of event ordering. It cannot be the same Transaction.
And I need the optimistic concurrency too - if other threads uses the entity at the same time.
BTW: This is using Raven 2.0.3.0
Since no one else have answered, I had better give it a go myself.
It turns out this was a human error. Due to a bad configuration of our IOC container the DataAccess.NewOpenSession gave me the same Session all the time (across other tests). In other words Raven works as expected :)
Before I found out about this I also experimented with using TransactionScopeOption.Suppress instead of RequiresNew. That also worked. Then I just had to make sure that whatever I did in the suppressed scope could not fail. Which was a valid option in my case.
I'm using autofac and the interfaces are correctly resolved but this code fails with "No connection could be made because the target machine actively refused it 127.0.0.1:8081"
using (var store = GetService<IDocumentStore>())
{
using (var session = store.OpenSession())
{
session.Store(new Entry { Author = "bob", Comment = "My son says this", EntryId = Guid.NewGuid(), EntryTime = DateTime.Now, Quote = "I hate you dad." });
session.SaveChanges();
}
}
Here is the registration
builder.Register<IDocumentStore>(c =>
{
var store = new DocumentStore { Url = "http://localhost:8081" };
store.Initialize();
return store;
}).SingleInstance();
When I navigate to http://localhost:8081 I do get the silverlight management UI. Although I'm running a Windows VM and vmware and Silverlight5 don't play together. That's another issue entirely. Anyways does anyone see what I'm doing wrong here or what I should be doing differently? Thanks for any code, tips, or tricks.
On a side note, can I enter some dummy records from a command line interface? Any docs or examples of how I can do that?
Thanks All.
Just curious, are you switching RavenDB to listen on 8081? The default is 8080. If you're getting the management studio to come up, I suspect you are.
I'm not too familiar with autofac but, it looks like you're wrapping your singleton DocumentStore in a using statement.
Try:
using (var session = GetService<IDocumentStore>().OpenSession())
{
}
As far as dummy records go, the management studio will ask you if you want to generate some dummy data if your DB is empty. If you can't get silverlight to work in the VM, I'm not sure if there's another automated way to do it.
Perhaps using smuggler:
http://ravendb.net/docs/server/administration/export-import
But you'd have to find something to import.
i am trying to setup Redis on appharbor. I have followed their instructions and again i have an issue with the Booksleeve API. Here is the code i am using to make it work initially:
var connectionUri = new Uri(url);
using (var redis = new RedisConnection(connectionUri.Host, connectionUri.Port, password: connectionUri.UserInfo.Split(new[] { ':' }, 2)[1]))
{
redis.Strings.Set(1, "greeting", "welcome to remember your stuff!");
try
{
var task = redis.Strings.GetString(1, "greeting");
redis.Wait(task);
ViewBag.Message = task.Result;
}
catch (Exception)
{
// It throws an exception trying to wait for the task?
}
}
However, the issue is that it sets the string correctly, but when trying to retrieve the same string from the key value store, it throws a timeout exception waiting for the task to eexecute. However, this code works on my local redis server connection.
Am i using the API in a wrong way? or is this something related to Appharbor?
Thanks
Like a SqlConnection, you need to call Open() (otherwise your messages are queued for delivery).
Unlike SqlConnection, you should not fire up a RedisConnection each time you need it - it is intended to be used as a shared, thread-safe, multiplexer - i.e. a single connection is held somewhere and used by lots and lots of unrelated callers. Unless of course you only need to do one thing!
I'm trying to get started using agsXMPP, but I'm having some problems. I'm trying to run this code:
using System;
using agsXMPP;
namespace TestAgs
{
class MainClass
{
public static void Main (string[] args)
{
XmppClientConnection connection = new XmppClientConnection ();
connection.OnLogin += delegate {
Console.WriteLine ("logged in");
};
connection.Server = "gmail.com";
connection.ConnectServer = "talk.google.com";
connection.Username = "my username"; // I tried both with and without '#gmail.com'
connection.Password = "my password";
connection.Open();
}
}
}
This compiles fine, but when I try to run it, nothing happens. It runs and completes without any errors, but "logged in" never gets printed to the console. What am I doing wrong?
If it makes a difference, I'm using Mono 2.4 on Ubuntu 10.04.
Unless connection.Open () blocks, which I doubt, the issue is that your program hits the end of main, and therefore it is done running and ends.
How you want to keep it from exiting depends on what you are trying to do, but one way would be a ManualResetEvent:
var mre = new System.Threading.ManualResetEvent (false);
mre.WaitOne ();
Of course, now you may have the opposite problem, there is no way for your app to finish.
I think issue is port number. You did not supply 5222 or 5223 in the connection.
just add Console.ReadLine(); after the line 'connection.Open();'
// connection.Server = "gmail.com";
connection.ConnectServer = "talk3.l.google.com"; OR
connection.ConnectServer = "talk2.l.google.com";
connection.Username = "my username"; // I tried both with and without '#gmail.com'
connection.Password = "my password";
connection.Open();
talk3.l.google worked fine for me.