Using Mongo C Driver in multi threaded application

[Meiqi Zhu]

I am using MongoDB in my multi-threaded application written in 'C'.  Ecah thread hold a client created by mongoc_client_pool_pop to write and read.

In most cases ， My Code works and can get the right result. But sometimes I get errors like:

           Failed to decode reply BSON document.

           Failed to send "ping" command with database "admin": Failure during socket delivery: Invalid argument (22)

i am wondering wheather the mongo c driver is thread safe  or not ? 

[Wan Bachtiar]

i am wondering wheather the mongo c driver is thread safe or not ?

Hi Meiqi,

As mentioned in the API manual for MongoDB C Driver v1.3.x: Threading, the driver is thread unaware for most of its operations. It is up to the you to guarantee thread-safety. You could use the thread-safe mongoc_client_pool_t to retrieve a mongo_client_t for your thread.

Each thread hold a client created by mongoc_client_pool_pop to write and read.

If you are already using mongoc_client_pool_t, make sure that each mongo_client_t retrieved is being used only for that given thread.

Regards,

Wan.

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