warn about pipe-timeout change in 3.2 upgrade docs

git-svn-id: svn://svn.powerdns.com/pdns/trunk/pdns@2978 d19b8d6e-7fed-0310-83ef-9ca221ded41b

diff --git a/pdns/docs/pdns.xml b/pdns/docs/pdns.xml
index e168f173c3c6328cfb44bb3e81184cf61ea87e73..31a8b01fff372811c967d8698ba2553f56f2ef5f 100644 (file)
--- a/pdns/docs/pdns.xml
+++ b/pdns/docs/pdns.xml
@@ -11147,6 +11147,12 @@ create index recordorder on records (domain_id, ordername text_pattern_ops);
 
                Additionally, with 3.2 supporting empty non-terminals (see <xref linkend="dnssec-direct-database" />), your frontend may need some changes.
        </para>
+       <para>
+               Due to a bug, in 3.1 and earlier releases, the pipebackend would default to a 1000 second timeout for
+               responses from scripts, instead of the intended and documented 1000 milliseconds (1 second). In 3.2,
+               pipe-timeout is in fact in milliseconds. To avoid some surprise, the default is now 2000 (2 seconds). If you
+               have slow pipebackend scripts, make sure to increase pipe-timeout.
+       </para>
   </sect1>
 
   </chapter>