I am using an Aurelia web application and utilize the http.fetch to call upon various Web APIs.
To help debug I log any errors on the fetch using a catch statement, so something like this:
this.http.fetch('Controller/APIFunc', mymethod).then(response => response.json()).then(info => {
//Do Stuff on success
}).catch(error => {
this.globalfuncs.HandleFetchErrors(error);
});
Occasionally I would get errors with the following messages "the network connection was lost" or "failed to fetch" or "cancelled" which I attributed to an interrupted network connection and ignored.
BUT lately (as of Nov of 2021) I started getting a new error that is coming several times a day, and I do not know what it means.
It simply states "Load Failed."
I'm trying to reproduce it but I cannot in my local environment, so I'm trying to find what it implies.
My clients are not contacting me about having any issues, but I'm still troubled by the frequency of this error (coming about 3-6 a day).
Is this yet another type of network interruption perhaps? I've searched multiple sites and threads and cannot find an explanation for this catch error "Load Failed."
Any thoughts out there would be great!
Related
This is a follow-up from the following question: Having trouble connecting to iSeries from .NET Core
The initial problem was resolved by setting a port number. I'm now running into the problem of the connection seemingly opening, however, hanging on the actual .Open() step - IE, never continuing on to the next line of code. For reference, here's my code block:
public static DB2Connection GetDatabaseConnection(string connectionString)
{
DB2Connection DB2Connection = new DB2Connection(connectionString);
DB2Connection.SystemNaming = true;
try
{
DB2Connection.Open();
return DB2Connection;
}
catch (Exception ex)
{
throw ex;
}
}
And my connection string is in this format: Server=###.###.###.###:#####;Database=DATABASE;UID=USER;PWD=PASSWORD;LibraryList=LIBRARY,LIST
Looking at the logs on the i Navigator, I see that there is a job name Qzhqssrv when is opened, with the user Quser, status Running, and type Prestart batch - Server. Looking into the logs for that entry, I see Job #####/QUSER/QZHQSSRV started on DATE at TIME in subsystem QUSRWRK in QSYS. Job entered system on DATE at TIME. However, it doesn't seem to continue beyond that.
Looking at the logs for a similar operation, when I'm connecting via Access Client Solutions, I get considerably more information and more steps in the logs. This leads me to believe that the system is waiting for me to send further information, however, my application is still stuck on .Open() - so perhaps there is something else I was supposed to send as part of the .Open() instruction. If so, I'm not sure what it would be.
Any insights would be greatly appreciated. Thanks!
Just to close this topic out - the problem was indeed the lack of a license. Connecting on port 446 was the correct approach, and once we got a license, we were able to get the connection working. Thanks #nfgl!
I have made a Blazor app, which is working well locally. When I put it on the server, quite often (when app uses DB context) I get this error :
Error: Connection disconnected with error 'Error: WebSocket closed with status code: 1006 ()
The user have to refresh the page, which is really annoying. You can't use app working in this way.
I have found a lot of discussions on this error, lot of plans...and almost everything is older than one year. I would expect the solution already, but haven't found anything.
Anyone knows, why is this happening and how to figure it out in the Blazor app? At least to catch this error and wait until the connection is back, so the page is not getting faded?
So far I was able to do only automatic reloading of page by javascript, when I get this error. But anyway, I can't use this solution in production, because the page is down for a second and it doesn't look good. I need to catch it before and keep the page active.
Thank you.
FYI , Have you check somewhere on the server-side like the logic that use data from DB context or the security/config in the production between IIS server and DB? If you are sure that it's come from the DB context then have you validate by test other possibility like make the test method that have long delay time/or mockup method that return the data to check whether the error still occur?
I once have a really stupid code in an object. but the code is build with no error. But it clash on runtime with no clue relate to the problem.
private string _oh;
public string oh
{
get { return _oh; }
set { oh= value; // cause infinite loop > should _oh
}
}
The worst part is that the error throwed is the same message as this question, So I quite sure there is the root clause elsewhere.
Error: Connection disconnected with error 'Error: WebSocket closed with status code: 1006 ()
Problems:
I have a web app that is getting battered. Everything is working but I get about two errors a day I can not explain. It could be the first user hitting the system because the error appears in the error log intermittently it occurred today around 7:30 am in servers time zone (same as the users).
I fixed an old issue by implicitly destroying the connection by way of the using statement as it only marks the connection as recyclable.
Error Log:
Message: 3df8d62a-6b47-479e-b5d2-b23e0db92d92 : System.InvalidOperationException: Invalid operation. The connection is closed.
at System.Data.SqlClient.SqlConnection.GetOpenConnection()
at System.Data.SqlClient.SqlConnection.get_ServerVersion()
at System.Data.Linq.SqlClient.SqlProvider.get_IsServer2005()
at System.Data.Linq.SqlClient.SqlProvider.InitializeProviderMode()
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression)
at System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source)
at xxxxx.Resources.Data.LINQ.DistrictService.GetDistrict(Int32 districtID)
Related Code:
//--------------------------------------------------------------------------------------------
public Domain.Data.District GetDistrict(int districtID)
{
using (_dataContext = new DistrictDataDataContext(_systemService.GetCurrentSystem().WriteOnlyDatabase.ConnectionString))
{
Mapper.CreateMap<District, Domain.Data.District>();
return (from s in _dataContext.Districts
where s.DistrictID == districtID
select Mapper.Map<District, Domain.Data.District>(s)).SingleOrDefault();
}
}
Note:
I think that this is a non-issue because the inherent behavior of the connection pooling might be firing a retry (this could just be information saying "hey we tried what you asked for but the connection was closed, we will now open one up it.") however, If this is the case, I do not get a confirmation of successful retry and I am not even sure would be expected. We have had no complaints and this cant be duplicated in house by our QA staff. I hope maybe someone else has come across this.
Is there anyway to log message contents when an exception occurs?
I looked at various logging extensions but they are just logging CorrelationId. And message contents are not available.
There is a CurrentMessge property in MessageContext, but that is not available at the time logger writes the exception.
I tried to handle PoisonMessage Event, which allows me to log the message contents.
public static void OnPoisonMessage(IBus bus, ReceivedTransportMessage receivedTransportMessage, Rebus.Bus.PoisonMessageInfo poisonMessageInfo) {
var message = new JsonMessageSerializer().Deserialize(receivedTransportMessage);
Log.Error("{#messageType} failed {#message}", message.Messages[0].GetType(), message);
}
This works great, but now I have two errors in the log one coming from my handler and the other coming from logger.
I am wondering if there is a better way to handle this requirement.
If your requirement is to simply log the message contents as JSON, I think you've found the right way to do it - at least that's the way I would have done it.
I'm curious though as to what problem you're solving by logging the message contents - you are aware of the fact that the failing message will end up in an error queue where you can inspect it?
If you're using MSMQ, you can inspect JSON-serialized messages using Rebus' Snoop-tool, which is a simple MSMQ inspector. It will also allow you to move the message back into the input queue where it failed ("return to source queue")
A good way to monitor your Rebus installation is to set up some kind of alerts when something arrives in an error queue, and then you can look at the message (which event includes the caught exceptions in a special header) and then resolve the situation from there.
I am currently trying to get search working in my Tridion 2011 installation. I read in another article that I should run the TcmReIndex.exe tool in the Tridion/bin folder to re-index all my sites. So I tried this and it failed with a message box giving the following details
Unable to get list of Publication items.
Unable to Intialize TDSE object.
The wait operation timed out
Connection Timeout Expired. The timeout period elapsed while attempting to consume the pre-login handshake acknowledgement. This could be because the pre-login handshake failed or the server was unable to respond back in time. The duration spent while attempting to connect to this server was - [Pre-Login] initialization=21054; handshake=35;
The wait operation timed out
A database error occurred while executing Stored Procedure "EDA_TRUSTEES_GETTRUSTEEETOKEN"
I have four fairly large publications (100 000+ items in total) which I am trying to index.
Any ideas?
Whenever I get "Unable to Intialize TDSE object." errors, I typically write a small test script using VBScript, and try running it on the CMS server. Whilst this does not directly solve the problem, it often gives some insight into the issue by logging information in the event viewer. Try creating a test.vbs file as follows and running it:
Set tdse = CreateObject("TDS.TDSE")
tdse.initialize()
msgbox(tdse.User.Description)
Set tdse = Nothing
If it throws any errors, please let me know, and it may help us solve the problem. If it gives you a popup with your user description, then I am completely barking up the wrong tree.
I haven't come to anything conclusive but it seems like my issue may have been a temporary one as it just started working. I did increase all timeouts in Tridion MMC > Timeout Settings by 100 times their amounts but I suspect that this wasn't the issue, when it works the connection is almost instant.
If anyone else has this issue
Restart the computer the content manager is installed on, try again.
Wait an hour or two, try again.
Increase timeouts, try again.
I've run the process a few more times and it seems to be working correctly.