nginx.conf
worker_processes 4
I add some log and print to monitor like this:
nginx: [emerg] Out LOOP start:08A848A8, b->pos:08A848B9, alloc:18 bytes, word->data:worker_processes,len(word->data):16 in /usr/local/nginx/conf/nginx.conf:3
nginx: [emerg] Out LOOP start:08A848BA, b->pos:08A848BC, alloc:3 bytes, word->data:4,len(word->data):1 in /usr/local/nginx/conf/nginx.conf:3
"worker_processes" need 16+1 bytes, but alloced 18bytes
"4" need 1+1 bytes, byt alloced 3 bytes
In a binary tree deletion, as its defination, first we need to find the
minimum node of its right sub-tree to replace the location of the node
to be deleted when it has both its left and right children. Then we
shall trace its sub-tree to find the minimum node in `ngx_rbtree_min`
function. Since the terminal condition of the tracing loop has already
been set as `node->left == sentinel`, there is no need to leave the
following if-condition judging whether the substitute node's left child
is the sentinel any more because the program will never run here. And the
code will be cleaner as well as may run even faster in some situations
after removing this redundant conditional branch.
In C++ SGI STL stl_tree.c source, we can see there is no if-condition
judgement in rbtree deletion:
https://github.com/dutor/stl/blob/master/sgi/stl_tree.h#L317
By the way, the current released Nginx source still has this issue but
I have no idea how to commit this patch to the project.
Signed-off-by: Leo Ma <begeekmyfriend@gmail.com>
This directive is used to set some locations avoiding
client certificate verfication. If you turn on this
directive in one location, this location will not be
affected by the ssl_verify_client directive upper level.
Signed-off-by: Paul Yang <paulyang.inf@gmail.com>
Previously, nginx closed client connection in cases when a response body
from upstream was needed to be cached or stored but shouldn't be sent to
the client. While this is normal for HTTP, it is unacceptable for SPDY.
Fix is to use instead the p->downstream_error flag to prevent nginx from
sending anything downstream. To make this work, the event pipe code was
modified to properly cache empty responses with the flag set.
The spdy module handle request body (DATA frame) in memory buffer or disk temp
file always. In such case, it cannot work with "proxy_request_buffering off".
Thanks to Arlen Stalwick.
This bug may cause CPU 100% if tengine uses LEVEL event module
(e.g. select, poll, /dev/poll).
While receiving write event from upstream connection, it tries to read
data from client and check whether there is enough data to send to upstream.
If there is not enough data, it just returns and waits next event. However,
there is a bug that it does not "handle" the write event. If it does not delete
the write event from /dev/poll, this write event will be reported to tengine again.
And then tengine has infinite loops.
For read event, the situation is similar to write event.
Thanks to Arne Jansen.