Option D is a security tool that can detect vulnerabilities in the application, but it's not related to the database timeouts. Option C while it can be helpful in certain scenarios, in this case it's less likely to be the cause of the problem. Option A is not relevant as it is not related to the issue. Other possible solutions, while they can be useful in certain situations, are not as relevant in this scenario. This can help you understand how the application is utilizing the resources and identify any bottlenecks in the code that might be causing the timeouts. Profiler can help you to visualize the resources utilization throughout the application, including CPU and memory usage, and identify any parts of the application that might be causing high load. Stackdriver Profiler can be used to identify and diagnose performance issues in the application. The most probable cause of the database timeout when the number of concurrent active users remained stable is a performance issue. or try increasing the connection timeout (currently 10 seconds). Use Stackdriver Profiler to visualize the resources utilization throughout the application Be sure that the address is correct and that you have the necessary privileges, or try increasing the connection timeout (currently 10 seconds). I am using a mac and I typically use Sequel Pro to interact with sql databases. In the case of Sequel, every database driver/adapter likely has an option of specifying the timeout at the driver-level, and the mysql2 driver itself has three kinds of timeouts: :read_timeout, :write_timeout, and :connect_timeout.B. What you should do, instead of using the generic Timeout library, is to use the library-specific timeouts for any system calls, if it's available (and it usually is). See " Ruby's Most Dangerous API" by Mike Perham for more details. The problem is that Ruby itself doesn't even have a way to terminate the thread in a way that it executes its ensure blocks, as far as I know, so it's not really an issue with the implementation of the Timeout library. So, as anyone will do, I checked online there were a lot of command lines, snippets, and ideas out. Be sure that the address is correct and that you have the necessary privileges, or try increasing the connection timeout (currently 10 seconds). The limitation of Thread#kill is that it won't call any ensure blocks declared by Sequel::Database#transaction, it will just terminate the thread wherever it currently was. Solved: Sequel Pro connection failed Unable to connect to host 127.0.0.1, or the request timed out. You see, Timeout.timeout spawns a new thread that starts executing whatever is in the block, but once the N seconds have run out, it calls Thread#kill on that thread. How do I lengthen the time allowed to make the connection. connection information in order to improve functionality and performance. When I attempt to connect with a remote mysql database via vpn, the connection times out. Therefore, the transaction is There actually is nothing that the Sequel library can do to work around this, and that's the major flaw of the Timeout standard library. Because Tableau has no representation of the SQL dialect used by an ODBC data. It throws an exception object instead of raising an exception. However, Timeout.timeout will not raise a Timeout::Error exception within the block, even if a timeout occurs. If an exception is raised in Sequel::Database#transaction block, the transaction is rolled back. After the connection is lost Sequel usually crashes. This has almost never happened with older versions, but happens often with the current version (0.9.7, Build 1630). tmp/test-3.rb:10:in `sleep': execution expired (Timeout::Error)įrom /tmp/test-3.rb:10:in `block (2 levels) in 'įrom /tmp/gems/gems/sequel-4.44.0/lib/sequel/database/transactions.rb:215:in `_transaction'įrom /tmp/gems/gems/sequel-4.44.0/lib/sequel/database/transactions.rb:190:in `block in transaction'įrom /tmp/gems/gems/sequel-4.44.0/lib/sequel/database/connecting.rb:280:in `block in synchronize'įrom /tmp/gems/gems/sequel-4.44.0/lib/sequel/connection_pool/threaded.rb:107:in `hold'įrom /tmp/gems/gems/sequel-4.44.0/lib/sequel/database/connecting.rb:280:in `synchronize'įrom /tmp/gems/gems/sequel-4.44.0/lib/sequel/database/transactions.rb:156:in `transaction'įrom /usr/local/ruby24/lib/ruby/2.4.0/timeout.rb:108:in `timeout' Open a connection Wait a while Edit a field A dialog appears telling me Sequel lost the connection. I, INFO - : (0.000195s) INSERT INTO `test` (`id`) VALUES (123) 1 min read - I had this little error message that got me crazy for a while: Unable to connect to host 127.0.0.1, or the request timed out.
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