Thanks Daniel.
I am using multiple threads but each thread is doing "init+perform".

Are you saying if thread_1 does init() &
     if thread_2 uses the handle returned by init (from thread_1) to invoke
perform() API then we may get into "easy handled already used in multi
handle" issue ?
*Do we need same thread always invoke init + perform ?*

thanks, krishna

On Wed, Feb 13, 2019 at 5:00 AM Dave Reisner via curl-library <
curl-library_at_cool.haxx.se> wrote:

> On Tue, Feb 12, 2019 at 06:49:17AM -0800, kishore koney via curl-library
> wrote:
> > Thanks Daniel.
> >
> > I am not pretty sure when you said " you're adding one of those handles
> > twice." What does it mean ?
> > All that I am using is curl_easy_init(), curl_easy_perform(),
> curl_easy_cleanup
> > APIs.
>
> Your original email mentions multiple threads. Are you trying to use a
> single easy handle across all of the threads, or are you calling
> init+perform for each thread? The former scenario would have a high
> likelihood of encountering the error you describe.
>
> > I am getting the error(easy handled already used in multi handle) when I
> called
> > curl_easy_init() followed by curl_easy_perform ? Which of these API is
> adding
> > handles twice to ???
> >
> > thanks, krishna
> >
> > On Mon, Feb 11, 2019 at 10:48 AM Daniel Stenberg <daniel_at_haxx.se> wrote:
> >
> > On Mon, 11 Feb 2019, kishore koney via curl-library wrote:
> >
> > > I am using *libcurl(version = 7.61.1*]*)* easy API for downloading
> http
> > > url/files(as byte-range chunks). I am getting
> libcurl_easy_perform()
> > return
> > > error_code(*2*) and errorBuffer((*easy handled already used in
> multi
> > > handle*). I am opening 10 concurrent active libcurl easy handles
> as part
> > of
> > > 10 threads in a process. Is that OK ?
> >
> > Sure, that's fine. But since this error occurs, it sounds as if
> you're
> > adding
> > one of those handles twice.
> >
> > > Is there any limit on how many concurrent libcurl easy
> > > handles(libcurl_easy_init) a process can keep active at a time ?
> >
> > No. Although you might run into problems when reaching the maximum
> number
> > of
> > open file descriptors you can have in a process, which typically
> defaults
> > to
> > 1024.
> >
> > > *I do not get this error all the time but once in a while(1 out of
> 10
> > easy
> > > handles). Are there any tips on handling this error ? What context
> will
> > > raise this error ?*
> >
> > It explains itself: when you try to add a handle to a multi handle
> that
> > already is added to a multi handle.
> >
> > > Are there any libcurl usergroups/forums where I can post my libcurl
> > queries
> > > ?
> >
> > I would say that this is the most suitable one.
> >
> > --
> >
> > / daniel.haxx.se
> >
>
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Received on 2019-02-13