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ERROR 2006 (HY000): MySQL server has gone away
... increase Max Allowed Packet
SET GLOBAL max_allowed_packet=1073741824;
http://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html#sysvar_max_allowed_packet
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How to link Docker services across hosts?
...odes in your cluster
$ swarm list --token=6856663cdefdec325839a4b7e1de38e8
http://<node_ip:2375>
UPDATE 2
The official approach is now to use libswarm see a demo here
UPDATE
There is a nice gist for openvswitch hosts communication in docker using the same approach.
To allow service disc...
How can i use iptables on centos 7? [closed]
...ssh port as permanent opened port
firewall-cmd --zone=public --add-port=22/tcp --permanent
Then, you can reload rules to be sure that everything is ok
firewall-cmd --reload
This is better than using iptable-save, espacially if you plan to use lxc or docker containers. Launching docker services ...
WebSockets vs. Server-Sent events/EventSource
...se or IndexedDB object store). If you'll need to send data to a server, XMLHttpRequest is always a friend.
SSEs are sent over traditional HTTP. That means they do not require a special protocol or server implementation to get working. WebSockets on the other hand, require full-duplex connection...
how can I see what ports mongo is listening on from mongo shell?
...like the ones above, then the mongod will be listening on 27017 and 28017 (http console) by default. Note: there are a couple of other arguments that can alter ports without being explicit, see here:
https://docs.mongodb.org/manual/reference/configuration-options/#sharding.clusterRole
...
MVC Vs n-tier architecture
...ns can be use together harmoneously. Here is a good comparison of the two: http://allthingscs.blogspot.com/2011/03/mvc-vs-3-tier-pattern.html
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Cassandra port usage - how are the ports used?
...eUploader: {
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Logging request/response messages when using HttpClient
...ome notes:
LoggingHandler intercepts the request before it handles it to HttpClientHandler which finally writes to the wire.
PostAsJsonAsync extension internally creates an ObjectContent and when ReadAsStringAsync() is called in the LoggingHandler, it causes the formatter
inside ObjectContent to s...
What is the difference between new/delete and malloc/free?
...ight: That used to be true but no longer. See: linux.die.net/man/3/free If ptr is NULL, no operation is performed.
– Martin York
Jun 19 '16 at 17:12
2
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How to grant remote access permissions to mysql server for user?
...pe (and any routers in between) as to how to open up the connection. Open TCP port 3306 inbound, and give it a similar access rule for external machines (all/subnet/single IP/etc.).
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