Based on the file name (ev_epoll_linux.c), this seems like an older version
(earlier than 1.4). Could you please upgrade to the latest version 1.7 ?
thanks,
Sree
On Tuesday, November 7, 2017 at 4:26:10 PM UTC-8, David Garcia Quintas
wrote:
>
> Which version of grpc are you using?
>
> On Friday, 3 November 2017 20:31:35 UTC-7, kaustubh.k...@gmail.com wrote:
>>
>> Even I'm facing a similar issue. Can someone please guide ?
>>
>> On Thursday, June 8, 2017 at 2:11:22 PM UTC-5, haiya...@dejero.com wrote:
>>>
>>> Hello,
>>>
>>> I am working a grpc client application (C++) to talk to grpc server on
>>> remote:
>>>
>>> 1. First I use grpc::CreateChannel(...) to create a new channel instance
>>> and it is successful:
>>>
>>> auto spChannel = grpc::CreateChannel("unix:/tmp/test_sock",
>>> grpc::InsecureChannelCredentials());
>>>
>>> 2. Then I check channel state:
>>>
>>> auto chanState = spChannel->GetState(false);
>>> if (chanState == GRPC_CHANNEL_IDLE)
>>> {
>>> spChannel->GetState(true); // this will trigger connect to
>>> server
>>> }
>>>
>>> 3. It could be server side is not ready yet, as such the connect would
>>> fail. Then I remove old channel and
>>> create a new one in step 1).
>>>
>>> spChannel = grpc::CreateChannel("unix:/tmp/test_sock",
>>> grpc::InsecureChannelCredentials());
>>>
>>> 4. Repeat step 2) - 3) until server is up (backoff timing is omitted).
>>>
>>> The logic above works without problem when server comes up later.
>>> However, there is an issue when channel instance
>>> is destroyed: the file descriptor id associated with channel is not
>>> freed. Let's say if server comes up in a long time, the following complaint
>>> from grpc lib tells us that no file description id available eventually:
>>>
>>> Jun 08 04:00:28 conn[25285]: E0608 04:00:28.076832140 25285
>>> ev_epoll_linux.c:1825] add_poll_object: {"
>>>
>>> created":"@1496894428.076821026","description":"polling_island_create","file":"src/core/lib/iomgr/ev_epoll_linux.c","file_line":284,
>>> "referenced_errors":[{"created":"@1496894428.076819933","description":"OS
>>> Error","errno":24,"file":"src/core/lib/iomgr/ev_epoll_linu
>>> x.c","file_line":561,"os_error":"Too many open
>>> files","syscall":"epoll_create1"}]}{quote}
>>>
>>> Tracing code to src/core/lib/iomgr/ev_epoll_linux.c, the function
>>> polling_island_create() is the one to create file descriptor id (epoll_id).
>>> However, the polling_island_delete(...) should be called when channel is
>>> destroyed as well. Otherwise, the file descriptor ids will be
>>> leaked and led to the above error.
>>>
>>> Has anyone seen this ? Or I didn't use the grpc channel properly ?
>>>
>>> Thanks,
>>>
>>> Haiyang Yin
>>>
>>
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