We are getting intermittent failures while connecting to one of the backend system. When we looked at the logs we can see that the connection is getting closed by either wso2/backend. We are unbale to make out where exactly the problem is.? Please find the below logs we get immediately(1-3 millisecond) after sending a request.
WARN {org.apache.synapse.transport.passthru.TargetHandler} - Connection closed by target host before receiving the response Remote Address : backend.system.com/0.0.0.0:443
We are using wso2esb-5.0.0. Any suggestion will be appreciated.
Thanks
Here the backend has closed the connection for some reason. You may have to check backend logs and backend loadbalancer logs to find a clue.
Some common cases backends fail like this is are being unable to handle
Keepalive
Chunking
HTTP version (1.1 vs 1.0)
Related
I am using JMeter 5.1 to conduct performance testing (HTTP requests), the system tested is web application on Google Cloud Platform. For JMeter, I configured 10 threads(users), and got error messages for failed request: failed: Connection timed out (Connection timed out)
and check result in "View Results in Table" found Connect time = Sample time and there is no latency time.
Under this condition, What should I try to find the root cause. Is there any analyze direction or method?
You can take a look to this link it explain some causes related to your issue.
In addition, if you are using GCP HTTP(S) Load balancer, you should take a look to stackdriver logs. That will provide more clues for your issue. You may need to change the timeout values for your load balancer or your backend.
This is due to TCP connection timeout, if JMeter fails to get the response within the bounds of the TCP Handshake it will fail the associated HTTP Request sampler.
Latency (also known as TTFB) would be 0 because there is no any response from the server.
same for sent bytes, same for header size in bytes.
If for your application response times over 2 minutes is acceptable and expected you can increase Connect timeout, the relevant setting lives under "Advanced" tab of the HTTP Request sampler (or even better HTTP Request Defaults)
For example this is how you can increase the Connect timeout to 5 minutes:
With regards to root cause, the reasons are numerous, i.e.:
wrong protocol/port combination
the port is blocked by OS firewall or GCP firewall
the application or VM is overloaded and cannot respont
incorrect configuration of application server/database/other middleware
etc.
I am getting this "Connection closed by target host before receiving the request" due this first system get time out.
But the problem is that we are getting the proper response from second system.
just provide one major problem
after getting the response from second system we are also getting the one more response.
that i am not able to understand.
the arch is
First System ---- > ESB ---->> second system
response
Second system ---->> ESB then we are going the clone
1. send response to first system
2. send request to DSS to log the request.
can you please help in this...
i am using wso2 esb 4.8.1 and i can not change right now it in production.
Regards,
Shachindra Singh
As you explained in your question, it seems connection between the client and the server has timed out. These kind of lagging can be happen due to the back-end slowness or the ESB server contention. Hence Increasing time out settings could be solve this problem.
By default the ESB closes the connection after 60 seconds. So even you increased the client(which send the request)the timeout the problem will not solve.
For your information in WSO2 ESB can set three types of timeouts:
socket timeout - This parameter will decide on the timeout which a
particular http request is waiting for a response.
endpoint timeout - This will help to configure timeout per endpoint.
synapse global timeout - This will decide the maximum time that a
callback is waiting in the ESB for a response for a particular
request.
Please refer below links [1], [2] to find more detailed information about WSO2 ESB Error Handling. Hopefully it will help you to solve the problem.
[1] http://soatutorials.blogspot.com/2015/06/wso2-esb-error-handling-tutorial-part-i.html
[2] https://docs.wso2.com/display/ESB480/Performance+Tuning
Cheers.
There are so many questions about this issue but none has been able to address my issue specifically and I have yet to find any valid explanation of the error itself:
The underlying connection was closed: The connection was closed unexpectedly
In our situation we are making a call to a 3rd Party API via SSL. On my local PC I can connect to that API make a request and get a response back, but on an IIS Production server I get this error. The API is using OAuth to authenticate.
What exactly does it mean. Is the request leaving our server and rejected by the remote server, or is it not even leaving our server and our system is preventing it from making the request.
Some more information incase anyone may know what the issue is:
No known changes to any networking, servers, routing, security (apparently)
No code changes recently
According to our own internal logging, the issue started off as an ocassional 403 Error-Forbidden then we saw a number of Cannot Connect to Remote Server. Eventually it failed with The underlying connection was closed: The connection was closed unexpectedly.
Can someone please explain what the actual error means? If anyone has experienced this in a similar situation and can shed some light, that would be greatly appreciated.
The underlying connection was closed: The connection was closed unexpectedly
This just says, that (probably the remote end) closed the TCP connection which underlies the SSL connection. Usually an SSL alert should be sent back on SSL related errors, but some stacks instead close the connection. It might also be that the peer does not expect SSL at all and thus closes the connection because of invalid data.
On my local PC I can connect to that API make a request and get a response back, but on an IIS Production server I get this error.
It is hard to say what the problem might be, but if this is not only the same API but also the same server then the problem must be related to differences in the client. This can be support in ciphers, TLS versions, client certificates etc which can be different between machines. If this is not even the same server you should make sure that the problem is not server related by contacting the non-working server with the working client.
A good idea is also to make a TCP dump (wireshark) and compare the handshakes.
More detailed problem analysis can only be done when you provide more details about the problem, see http://noxxi.de/howto/ssl-debugging.html#hdr2.2 on what might be useful information.
I'm getting a "Socket Error: Connection reset by peer" message using the tradeclient c++ demo code from the quickfix download.
another user commented that it was related to network issues. if anyone has the solution it would be appreciated.
QuickFix C++ Socket Error Connection Reset By Peer?
<20141221-17:32:11.049, FIX.4.4:myusername->hostusername, event>
(Created session)
<20141221-17:32:11.056, FIX.4.4:myusername-> hostusername, event>
(Connecting to fix.hostusername.com on port 5001)
<20141221-17:32:11.221, FIX.4.4:myusername-> hostusername, outgoing>
(8=FIX.4.49=10735=A34=149=myusername =20141221-17:32:11.21856= hostusername 98=0108=30141=Y10=000)
<20141221-17:32:11.221, FIX.4.4:myusername-> hostusername, event>
(Initiated logon request)
<20141221-17:32:11.253, FIX.4.4:myusername-> hostusername, event>
(Socket Error: Connection reset by peer.)
<20141221-17:32:11.253, FIX.4.4:myusername-> hostusername, event>
(Disconnecting)
think i found the reason. the host I'm trying to connect with is using quickfix java which supports SSL. the quickfix c++ client doesn't seem to support the SSL enable tag in the session settings. finally had to resort to wireshark to determine this. i searched all over the web and many people were reporting this similar error. i hope this post saves them any anyone in the future from debugging endlessly to solve this "Socket Error: Connection reset by peer" error.
Two reasons I am aware of for "Socket Error: Connection reset by peer" are:-
1) Your SenderCompId/TargetCompId does not match with that of other side. In that case just make sure you are using correct one.
2) Other one is that sequence number expected by server is something different what you are sending. In that case just try with ResetOnLogon field ( in your registry file )to No and check if that resolves the issue.
There can be many reasons for this error. However, I doubt it that network is responsible for this error as connection request has been sent to server properly. You could search through the internet for wider range of answers.
Could well be firewall, have you the right IP and port, and permission to get there?
think i found the reason. the host I'm trying to connect with is using quickfix java which supports SSL. the quickfix c++ client doesn't seem to support the SSL enable tag in the session settings. finally had to resort to wireshark to determine this. i searched all over the web and many people were reporting this similar error. i hope this post saves them any anyone in the future from debugging endlessly to solve this "Socket Error: Connection reset by peer" error. – geiger zaehler
We got this error message when we had not correctly imported the security certificate.
Currently, we run into one problem with timeout issue. Our application is based on Jetty and uses Zeus as load balancing. The maxIdleTime is set as default value 30000 in jetty.xml. When a request/connection exceeds 30 seconds, the connection status will change to TIME_WAIT, but we get the HTTP 500 Internal Error in the browser side.
I guess the HTTP 500 error comes from Zeus but I want to confirm this: how would Zeus handle the closed connection?
OR
The jetty service sends 500 to Zeus? If so, how can I confirm this?
The surefire way to iron out what is happening here is to sniff the packets using something like ethereal or tcpdump between the load balancer and the jetty server, and you can use the network tooling in something like firebug or the chrome developer tools to see what is happening on that side of the connection. You can also turn on debug on the jetty side to see what it is doing specifically.
Regardless, if your hitting your timeout settings then you need to either increase those settings or decided on a proper strategy to deal with them to avoid this sort of issue, assuming you don't want that 500 error on the browser.