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KNOWN_BUGS: A shared connection cache is not thread-safe

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Closes #4915
Closes #5802
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Daniel Stenberg 2020-08-11 15:43:42 +02:00
parent c46339eca1
commit cb8cf9d70f
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9
docs/KNOWN_BUGS
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@ -102,6 +102,7 @@ problems may have been fixed or changed somewhat since this was written!
11.8 DoH leaks memory after followlocation
11.9 DoH doesn't inherit all transfer options
11.10 Blocking socket operations in non-blocking API
11.11 A shared connection cache is not thread-safe
12. LDAP and OpenLDAP
12.1 OpenLDAP hangs after returning results
@ -744,6 +745,14 @@ problems may have been fixed or changed somewhat since this was written!
The list of blocking socket operations is in TODO section "More non-blocking".
11.11 A shared connection cache is not thread-safe
The share interface offers CURL_LOCK_DATA_CONNECT to have multiple easy
handle share a connection cache, but due to how connections are used they are
still not thread-safe when used shared.
See https://github.com/curl/curl/issues/4915
12. LDAP and OpenLDAP
12.1 OpenLDAP hangs after returning results

8
docs/libcurl/curl_share_setopt.3
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@ -74,10 +74,10 @@ by default. Note this symbol was added in 7.10.3 but was not implemented until
7.23.0.
.IP CURL_LOCK_DATA_CONNECT
Put the connection cache in the share object and make all easy handles using
this share object share the connection cache. Using this, you can for example
do multi-threaded libcurl use with one handle in each thread, and yet have a
shared pool of unused connections and this way get way better connection
re-use than if you use one separate pool in each thread.
this share object share the connection cache.
Note that due to a known bug, it is not safe to share connections this way
between multiple concurrent threads.
Connections that are used for HTTP/1.1 Pipelining or HTTP/2 multiplexing only
get additional transfers added to them if the existing connection is held by