When started charles, java app cannot access redis got below error
redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: Read timed out
Then I tried to ignore the redis connection to solve it
but the problem still exists
So how to explicitly ignore some connection, e.g redis connection, mongo connection etc. ?
I'm sorry I don't really know what your real problem is. I guess the problem that you have is those HTTP requests still appearing in the Structure view, right?
Being that the case, I would strongly recommend you to use the Focus feature. To use it, you only need to add the domain you are working on to the View -> Focused Hosts... ( you can also do it by right clicking on the request and then selecting "Focus").
By doing this, all the non-focused domains will get grouped in a "Other hosts" entry in the Structure panel so they won't disturb your work anymore.
Related
I am making use of QuickFix/N
With an initiator/Client app does anyone know if there is a way to identify if the quickfix app is using Primary Host SocketConnectHost=xxx and SocketConnectPort=yyyy or Alternative/Backup/Secondary Host i.e. SocketConnectHost1=rrr and SocketConnectPort=zzz to connect to the server/acceptor.
Looking at the QuickFix Config tutorial i dont see anything that lets me find out.
http://quickfixn.org/tutorial/configuration.html
http://www.quickfixengine.org/quickfix/doc/html/configuration.html
There is no API for that, but the information is known inside QuickFIX/N. It does log it, here: https://github.com/connamara/quickfixn/blob/master/QuickFIXn/Transport/SocketInitiator.cs#L226
If you want to dig this information out, you can either modify QuickFIX/N to make some private things public (look for socketEndPoint), or implement a logger which captures the relevant phrase, or do some system-level introspection, i.e. use a system API to ask "What TCP connections do I have open now," like this: Get all TCP-connections opened by application using C#
I do not have access to the server. I can only set options for MySQL Workbench itself.
The problem I have is that for a certain website, if I update a row by accident, it crashes the database due to some badly set up cluster or something.
I want a connection to be treated like I only have read access so that there is no "apply" button when editing a table for in-case I forget.
So, is it possible to set some option to force read only mode on the client side?
This is not possible. It would require to modify quite a part of the UI for a very questionable feature. If have no rights to change data you will get an error anyway when trying to apply changes.
I'm building an iOS app, but the problem exists on all clients. iChat, Messages, Psi, etc. So because it exists on all clients I'm going to assume it's a server issue.
Has anyone ever experienced something like this? If so, what did you do to fix it? I'm sure it's some silly config setting or something but I simply can't figure this out. This is the only thing that looks like it might be related in ejabberd.log:
=ERROR REPORT==== 2012-09-05 12:07:12 ===
Mnesia(ejabberd#localhost): ** WARNING ** Mnesia is overloaded: {dump_log,
time_threshold}
Thanks in advance for any tips/pointers.
https://github.com/processone/ejabberd/blob/master/src/ejabberd_c2s.erl#L936 seems to have already been patched. The config variable is called resource_conflict and the value you want is setresource.
The above warning is (probably) not related to the issue you are facing. These mnesia events usually happens when the transaction log needs to be dumped, but the previous transaction log dump hasn't finished yet.
Problem that you are facing needs to be debugged for which you can set {log_level, 5} inside ejabberd.cfg. This will enable debug logging for ejabberd. Then look into the logs to find any guesses on why this is happening for you. Also, come back and paste your log file details here, probably we will be able to help you further. I have never faced such non-sensical issues with ejabberd.
Update after log file attachment:
As Joe wrote below, this is indeed happening because of resource conflict. Two of your clients are trying to login with same resource value. But in an ideal world this shouldn't matter. Jabber servers SHOULD take care of this by appending or prepending custom value on top of resource value requested by the client.
For example, here is what gtalk (even facebook chat) servers will do:
SENT <iq xmlns="jabber:client" type="set" id="1"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><resource>jaxl#resource</resource></bind></iq>
RCVD <iq id="1" type="result"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><jid>jabberxmpplibrary#gmail.com/jaxl#resou27F46704</jid></bind></iq>
As you can see my client requested to bind with resource value jaxl#resource but gtalk server actually bound my session with resource value jaxl#resou27F46704. In short, this is not a bug in your client but a bug in ejabberd.
To fix this you can do two things:
Resource value is probably hardcoded somewhere in your client configuration. Simply remove that. A good client will automatically take care of this by generating a random resource value at it's end.
Patch ejabberd to behave how gtalk server does (as shown above). This is the relevant section inside ejabberd_c2s.erl src which needs some tweaking. Also search for Replaced by new connection inside the c2s source file and you will understand what's going on.
This sounds like the "dueling resources" bug in your client. You may have two copies of your client running simultaneously using the same resource, and doing faulty auto-reconnect logic. When the second client logs in, the first client is booted offline with a conflict error. The first client logs back in, causing a conflict error on the second client. Loop.
Evidence for this is in your logfile, on line 3480:
D(<0.373.0>:ejabberd_c2s:1553) : Send XML on stream =
<<"<stream:error><conflict xmlns='urn:ietf:params:xml:ns:xmpp-streams'/>
<text xml:lang='en' xmlns='urn:ietf:params:xml:ns:xmpp-streams'>
Replaced by new connection
</text>
</stream:error>">>
I am trying to write a VPN app using VpnService. I started my app based on the sample ToyVpn. It seems to work fine but I am wondering if there is a way to get rid of the pop up dialog when I click connect. I am hoping that I could just click "connect" and it would start without having to click the "I trust this application..." check box and "Ok".
Thanks.
I don't think it's possible. They seem to be very careful about this class. If you take a look at the documentation you can see it says:
Letting applications intercept packets raises huge security concerns. A VPN application can easily break the network. Besides, two of them may conflict with each other. The system takes several actions to address these issues. Here are some key points:
User action is required to create a VPN connection. [emphasis mine]
There can be only one VPN connection running at the same time. The existing interface is deactivated when a new one is created.
A system-managed notification is shown during the lifetime of a VPN connection.
A system-managed dialog gives the information of the current VPN connection. It also provides a button to disconnect.
The network is restored automatically when the file descriptor is closed. It also covers the cases when a VPN application is crashed or killed by the system.
Since it says that user action is required to create the VPN connection, I assume they mean this is something you cannot control yourself.
I have a question regarding this topic.Like for Client Server Applications
1) is it necessary to load database directly into the Application.
Suppose if I have a DB in the back end and My application has to connect to that DB and display the results on the View for this do I need to Add DB into the Application directly.
2) can we access any DB or a File on the Remote server and show the required results.( with out adding that particular DB or A File into the application directly). How can we do this.
I saw a similar question in stackoverflow one answer was to use a PList, I am new to this.I am browsing the net but not able to get clear results. I lost many of my interviews because of this question.
Thanks,
1) is it necessary to load database
directly into the Application.
Suppose if I have a DB in the back end
and My application has to connect to
that DB and display the results on the
View for this do I need to Add DB into
the Application directly.
I'm not sure I understand this question. No, you don't need to load a database directly into a client in a client-server architecture. Normally, when I think of a design where a server has a database, I imagine there's some kind of way for the client to query the server for information. Perhaps it's making HTTP requests, which the server parses into a query, runs the query, and then returns the results (perhaps in XML form?).
2) can we access any DB or a File on
the Remote server and show the
required results.( with out adding
that particular DB or A File into the
application directly). How can we do
this.
Are you asking if it's possible, in general, to access a server database from a client? Yes, of course. (See above, re: HTTP Requests).
Any arbitrary file? That depends on how the server is set up. Again, HTTP is one protocol works that way; if you send an HTTP query like "GET someimage.png HTTP/1.0", the server could just be grabbing the whole file someimage.png and sending it back in the response. (Technically, it's not necessarily snarfing a whole file -- it could be creating that PNG dynamically since there's nothing in the HTTP protocol that says it must be sending an existing file -- but that's outside the scope of your question.)
I lost many of my interviews because
of this question.
Not to sound too snarky, but interviews are often won and lost not because you don't know the answer, but when you can't communicate effectively. You haven't phrased your question(s) here particularly well.