I got a Ubuntu host with multiple IP address aliases and I want to expose the ports from docker containers connected to one docker network bridge to a specific IP address of the host and the ports from the other containers to the other IP address of the host.
I want to make a webapp running in a tomcat available under multiple contexts.
http://localhost:8080/foo
should also be available under
http://localhost:8080/bar
but I do not want to have a second web application (e.g. by duplicating the war file or symlinking)
Is there a way to create such an alias inside tomcat or do I have to use mod_rewrite in apache2? (I already use mod_jk)
I am using s3fs to mount a S3 buckets on an Ubunutu server to store my daily backups there.
Considering security this would allow a potential hacker to delete all my backups from the mounted bucket.
Is there a way to prohibit that? Maybe mounting the bucket for write-only but not for deleting?
I am getting the following Exception from time to time when my users are connecting with their Android devices to out JSON Rest Service:
java.io.IOException: Socket read failed
at org.apache.coyote.ajp.AjpProcessor.read(AjpProcessor.java:313)
at org.apache.coyote.ajp.AjpProcessor.readMessage(AjpProcessor.java:364)
at org.apache.coyote.ajp.AjpProcessor.receive(AjpProcessor.java:331)
at org.apache.coyote.ajp.AbstractAjpProcessor.refillReadBuffer(AbstractAjpProcessor.java:614)
at org.apache.coyote.ajp.AbstractAjpProcessor$SocketInputBuffer.doRead(AbstractAjpProcessor.java:1065)
at org.apache.coyote.Request.doRead(Request.java:422)
at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:290)
at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:431)
at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:315)
at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:200)
at org.codehaus.jackson.impl.ByteSourceBootstrapper.ensureLoaded(ByteSourceBootstrapper.java:340)
at org.codehaus.jackson.impl.ByteSourceBootstrapper.detectEncoding(ByteSourceBootstrapper.java:137)
at org.codehaus.jackson.impl.ByteSourceBootstrapper.constructParser(ByteSourceBootstrapper.java:197)
at org.codehaus.jackson.JsonFactory._createJsonParser(JsonFactory.java:542)
at org.codehaus.jackson.JsonFactory.createJsonParser(JsonFactory.java:389)
at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1454)
at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readInternal(MappingJacksonHttpMessageConverter.java:124)
at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:153)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.readWithMessageConverters(HandlerMethodInvoker.java:641)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveRequestBody(HandlerMethodInvoker.java:605)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:354)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:171)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
I am running
- Apache/2.2.20
- mod_jk 1.2.36
- Tomcat 7.0.27
Could this have something to do with a timeout? Like the client closes the connection and the server is not able to read from the socket anymore? Or is it more likely a problem of the server configuration?
UPDATE:
Doing some Apache log awk I found the following Apache log lines corresponding to those Tomcat log exceptions:
192.186.30.116 - - [25/Jun/2012:10:47:14 +0200] "POST /myapp/methodX HTTP/1.1" 400 145 "-" "clientApp BlackBerry9360/7.0.0.530 VendorID/168" 10012655
192.186.30.120 - - [25/Jun/2012:10:53:13 +0200] "POST /myapp/methodY HTTP/1.1" 400 145 "-" "clientApp BlackBerry9800/6.0.0.668 VendorID/124" 10012164
192.186.30.116 - - [25/Jun/2012:10:53:36 +0200] "POST /myapp/methodZ HTTP/1.1" 400 145 "-" "clientApp BlackBerry9360/7.0.0.530 VendorID/168" 10012677
192.82.68.16 - - [25/Jun/2012:11:22:31 +0200] "POST /myapp/methodX HTTP/1.1" 400 145 "-" "clientApp BlackBerry9930/7.1.0.402 VendorID/104" 10012667
192.82.68.16 - - [25/Jun/2012:11:23:21 +0200] "POST /myapp/methodZ HTTP/1.1" 400 145 "-" "clientApp BlackBerry9930/7.1.0.402 VendorID/104" 10012562
You can see the status code 400 Bad Request sent to the clients for those requests.
The large numbers at the end of the line (e.g. 10012562) show the time the request was processed on the server in microseconds: 10012562 = about 10 seconds
Looks like the connection is somehow terminated after ten seconds? I looked into the AJP configuration but there is no timeout defined - 10 seconds would be the timeout for async requests which I am not using
We are hosting our web application http://timr.com on a server located in Germany. The server handles a high load of traffic very well and everything works as desired in terms of performance and load times.
However we sometimes get complaints from our overseas users (US, South America) that the experience slow page loading times.
What would be the best way to test the performance of a web application "as if you are on another continent"? I want to make sure that the distance between the server and the user is no problem?