c++ - Socket is open after process, that opened it finished -

-

after closing client socket on sever side , exit application, socket still open time.

i can see via netstat

every 0.1s: netstat -tuplna  | grep 6676     tcp        0      0 127.0.0.1:6676          127.0.0.1:36065         time_wait   -

i use log4cxx logging , telnet appender. log4cxx use apr sockets. socket::close() method looks that:

void socket::close() {     if (socket != 0) {         apr_status_t status = apr_socket_close(socket);         if (status != apr_success) {             throw socketexception(status);         }                 socket = 0;     } }

and it's processed. after program finished can see opened socket via netstat, , if starts again log4cxx unable open 6676 port, because busy. tries modify log4cxx. shutdown socket before close:

void socket::close() {     if (socket != 0) {         apr_status_t shutdown_status = apr_socket_shutdown(socket, apr_shutdown_readwrite);         printf("socket::close shutdown_status %d\n", shutdown_status);         if (shutdown_status != apr_success) {             printf("socket::close wtf %d\n", shutdown_status != apr_success);             throw socketexception(shutdown_status);         }         apr_status_t close_status = apr_socket_close(socket);         printf("socket::close close_status %d\n", close_status);         if (close_status != apr_success) {             printf("socket::close wtf %d\n", close_status != apr_success);             throw socketexception(close_status);         }         socket = 0;     } }

but didn't helped, bug still reproduced.

this not bug. time wait (and close wait) design safety purpose. may adjust wait time. in case, on server's perspective socket closed , relax ulimit counter, has not visible impact unless doing stress test.


Comments

Post a Comment

Popular posts from this blog

python - pip install -U PySide error -

-
does know how avoid following error when running pip install -u pyside per official website instructions here: https://pypi.python.org/pypi/pyside/#installing-pyside-on-a-mac-os-x-system note have done brew install qt successfully. you using pip version 7.0.3, version 7.1.2 available. should consider upgrading via 'pip install --upgrade pip' command. collecting pyside using cached pyside-1.2.4.tar.gz installing collected packages: pyside running setup.py install pyside complete output command /applications/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-build-cpxemt/pyside/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-0r7hri-record/install-record.txt --single-version-externally-managed --compile: ...
Read more

arrays - C++ error: a brace-enclosed initializer is not allowed here before ‘{’ token -

-
simple question: i'm trying initialize array within c++ class declaration: using namespace std; #include <string> class myclass{ public: string myarray[] = {"a","b","c"}; }; and i'm getting error: error: brace-enclosed initializer not allowed here before ‘{’ token no, without complied c++11 compiler, cannot initialize member array in declaration. have initialize array member in constructor. , don't use open array if know number of elements initialize array.
Read more

cytoscape.js - How to add nodes to Dagre layout with Cytoscape -

-
i trying add nodes dagre graph through cityscape.js. problem nodes not painted. code have: cy.add({ group: "nodes", data: { id:"n0",name:"n0",weight: 75 }, }); $.ajax(url).done(function(jsontree){ var newnodes=[]; for(var i=1;i<6;i++){ //var child = jsontree.result[i]; newnodes.push( { group: "nodes", data: { id: "n"+i, name:"n"+i}}, { group: "edges", data: { id: "e"+i, source: "n0", target: "n"+i } } ); } cy.add(newnodes); any ideas? have used loaded function reload graph not work. not know if have use specific function reload graph. thank in advance. you need add positions new nodes. cytoscape.js docs : it important note positions of newly added nodes must defined when calling cy.add(). nodes can not placed in graph without valid position — otherwise not displayed. yo...
Read more