connpool | Network connection pool in Go
kandi X-RAY | connpool Summary
kandi X-RAY | connpool Summary
Network connection pool in Go. This is a simple implementation of connection pool. For details and examples, please check out the [GoDoc] [uniqush-push] is using this library to connect with APNS.
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Top functions reviewed by kandi - BETA
- NewPool creates a new pool .
- Get returns a connection from the pool .
- printIndent is a helper function that prints tabular output .
connpool Key Features
connpool Examples and Code Snippets
Community Discussions
Trending Discussions on connpool
QUESTION
I have created 3 mongodb instances with below mongod.conf [Primary1,Secondary1,Secondary2]
...ANSWER
Answered 2021-Jan-11 at 10:41Issue got fixed. Primary database was able to connect to secondary hosts but in return secondary host can't. So I adjusted the security groups and connected. Takeaway is all the primary and secondary hosts should be able to connect with each other in mongodb port (27017)
QUESTION
I am trying to create a global connection pool for my Java app.
My problem is that when I use the following approach:
...ANSWER
Answered 2021-Jan-05 at 05:52I think you are looking for a thread-safe implementation of a Singleton class here. Of course, the way to achieve this is using enums, but for your case, you can implement double-check locking to ensure no two threads can call new MyPool() simultaneously.
Also, I think in your code, you are actually implementing a factory class, not really a singleton. Your MyPool is a different class than Singleton, which could have a public constructor.
I have made the appropriate changes with comments.
Double check-locking basically just checks the thread-safety before and after null-check, because the whole method is not synchronized, so two threads can indeed get the null value in the condition even after synchronization block, hence the second synchronization.
Also, I think your getPool() should be static. You won't be able to call getPool() without an explicit object of Singleton, which I think you don't need.
Corrected version:
QUESTION
I have a sharding system on Docker. I have a 6 shard with replica set (P-S-A), config server with a replica set, and 2 mongo servers.
When I close or remove the shard-primary container; Secondary became a primary for a short time and then secondary again. I have never been to reach the databases. I'm getting always below error
...ANSWER
Answered 2020-Jul-14 at 16:23The secondary node was unable to become primary because the arbiter voted no, which might have been related to it being unable to resolve the DNS name:
2020-07-14T14:06:39.449+0300 I ELECTION [replexec-1151] VoteRequester(term 2) received a no vote from srd01-arbiter:27017 with reason "can see a healthy primary (srd01-primary:27017) of equal or greater priority"; response message: { term: 2, voteGranted: false, reason: "can see a healthy primary (srd01-primary:27017) of equal or greater priority", ok: 1.0 }
The arbiter voted no because it wasn't yet aware that the primary was shutting down:
2020-07-14T14:06:39.448+0300 I ELECTION [conn10] Sending vote response: { term: 2, voteGranted: false, reason: "can see a healthy primary (srd01-primary:27017) of equal or greater priority" }
2020-07-14T14:07:01.022+0300 I NETWORK [ftdc] getaddrinfo("srd01-primary") failed: Temporary failure in name resolution
2020-07-14T14:07:01.024+0300 I REPL [replexec-1395] Member srd01-primary:27017 is now in state RS_DOWN - Couldn't get a connection within the time limit
Suggestions:
- Run the replSetStepDown command and wait for a new primary to be elected before shutting down the primary's container.
- Check the primary logs to see if it tried to step down prior to shutting down.
- Don't use arbiters unless absolutely required
QUESTION
I'm learning Google Cloud Vision API, but facing some issues. I have completely repeated all the steps from the 'Getting Started' Guide.
- download/install google cloud SDK
- activate login credentials using gcloud
- Set the environment variable GOOGLE_APPLICATION_CREDENTIALS
- Install the client library
After that I ran this code and got this error when compiling:
...ANSWER
Answered 2020-Nov-03 at 15:20Issue has been fixed.
I just needed to remove conflicting custom imports and re-install Google Vision library.
Well that was a dumb mistake, sorry to bother you.
QUESTION
I am not able to connect to the mongoDB Atlas cluster that I have made. I entered in the given line of code after I created the cluster and recieved the error:
I am not able to find any solution to this problem. Please help me.
...ANSWER
Answered 2020-May-06 at 09:36try adding --password ****
to the end of command
QUESTION
Trying to fetch records from orientdb. I am getting below error:
...ANSWER
Answered 2020-Apr-08 at 20:18I think you are consuming the OResultSet outside the Try block, this means that the session is closed and the rs
can't fetch more data from the database anymore.
QUESTION
I deployed a mongodb-replica set on google cloud vm (marketplace solution) and I can connect to it via browser-ssh where I created a database and enabled accessControl. However, I cannot connect to the set from the outside world or from an app on app engine.
my connection string looks like this:
...ANSWER
Answered 2020-Mar-09 at 11:46According to the analysis displayed in the bottom, the port is not open for the rest of the Ips.
Make sure the Firewall rules are enabling this. To do
- configure the firewall rule in Google cloud console
- provide a tag in your firewall rule
- tag your instance with the same tag as the firewall rule
QUESTION
I have a Python Flask based app that needs to connect to a database
...ANSWER
Answered 2020-Feb-11 at 14:32Your sysman container should connect to the database container using sysman-db:3306 (not 4000). Remember that it is communication between 2 services so the published ports don't count.
QUESTION
I met an error while inserting large volume data in mysql by using node.js Here is the data
...ANSWER
Answered 2018-Dec-03 at 06:22I have fixed this issue. It is caused by the default definition max_allowed_packet. Find max_allowed_packet in my.ini (C:\ProgramData\MySQL\MySQL Server 5.7). Update to 'max_allowed_packet=64M'. Restart mysql. Done.
QUESTION
I have an Express application running on port 3000. The front end runs on port 80, so this is a CORS application. Users are stored in an SQL server database. I'm using passport as the authentication method with Local Strategy as well as express session middleware. The application is a Single page application and all requests sent to server are done via ajax. Users log in on page and the credentials are sent and if authentication is successful, userID as well as username and FullNmae are supposed to be persisted to a session.
I have a lot of things wrong with this: The main thing is that after logging in, express saves the username and other data using passport on to a new session andsends back an html snippet to replace the body tag on the page. However, to test that the user object persists, I call the /create-user route and it says that the user object is not there. Additionally, a new session starts with every request (I check the logs and see that a different session ID is displayed each time). Not only that but at one point I was able to see the session cookie in the browser but I can no longer see it anymore. I tried to go back to the point where I could see the cookie but it still didn't appear!
I've been busting my head for hours and can't figure out why deserializeUser is not called nor why the data is not persisted. Where am I going wrong?
Note: some obvious code ommitted (app.listen(), require statements, etc.)
...ANSWER
Answered 2017-Dec-13 at 16:26I figured it out. I just had to remove the domain property on the session settings. That made it work.
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