Azure mvp deploy - #16

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Repository: baasith6/camera-phase-1

Length of output: 13886

🌐 Web query:

python-redis socket_timeout None blocking command socket_timeout None BRPOP command documentation

💡 Result:

In redis-py, the interaction between the client's socket_timeout and blocking commands like BRPOP has evolved significantly to resolve historical issues where socket-level timeouts would prematurely terminate blocking operations [1][2][3]. 1. Understanding the Timeouts - socket_timeout: This is a client-level configuration that sets a timeout for all low-level socket read/write operations [4][5]. If set to None (the default), the client waits indefinitely for a response from the Redis server [4]. - BRPOP timeout: This is an application-level parameter sent to the Redis server, which determines how long the server should wait for an element to become available in the specified list(s) [6]. A timeout of 0 instructs the server to block indefinitely [6]. 2. Historical Behavior and Issues Previously, if a user set a socket_timeout that was shorter than the BRPOP command's timeout, the client would raise a redis.exceptions.TimeoutError when the socket read exceeded the socket_timeout, even if the Redis server was still waiting for data [1][7]. Users often had to manually work around this by either using a separate Redis client instance without a socket_timeout for blocking operations or by setting the socket_timeout to be longer than the intended blocking duration [7][8]. 3. Current Behavior Recent updates to redis-py have addressed this by introducing logic to identify blocking commands [2][3]. When a blocking command (e.g., BRPOP, BLPOP, BZMPOP) is executed, the client now effectively bypasses or manages the socket_timeout for that specific operation [2][3]. Specifically, the client passes an internal indicator to the connection's read response method, which allows the socket to wait for the duration specified by the server (or indefinitely if the command timeout is 0) without being prematurely cut off by the client's global socket_timeout [2][3]. This ensures that the Redis server maintains control over the blocking duration, as intended [2]. Best Practice While the library now handles this automatically, it is still strongly recommended to set a non-None socket_timeout for production clients to prevent applications from hanging indefinitely in the event of network partitions or dead connections [4]. If your application requires robust blocking behavior, ensure you are using a current version of redis-py to take advantage of these improvements [2].

Citations:

• 1: Blocking command timeout cannot exceed client's socket_timeout redis/redis-py#2807
• 2: fix: prevent socket_timeout from aborting blocking commands redis/redis-py#4172
• 3: Fix blocking commands timeout when blocking_timeout exceeds socket_timeout redis/redis-py#4143
• 4: process hangs due to default socket_timeout=None redis/redis-py#2243
• 5: https://redis.readthedocs.io/en/stable/connections.html
• 6: https://redis.io/docs/latest/commands/brpop/
• 7: brpop raise redis.exceptions.TimeoutError if socket_timeout is less than brpop timeout redis/redis-py#583
• 8: Need clarification and better documentation on socket_timeout, socket_connect_timeout, and blocking commands redis/redis-py#1232

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echo "redis-py changelog/docs availability in repo:"
fd -i 'redis|requirements|pyproject|poetry.lock|lock|Dockerfile|rfdetr|pip' cloud-ai -t f -x sh -c 'echo "--- $1"; sed -n "1,160p" "$1"' sh {}

Repository: baasith6/camera-phase-1

Length of output: 1463

• cloud-ai/app/main.py#L56-L62 (this comment)
• docs/AZURE_MVP_DEPLOY.md#L165-L165

• cloud-ai/app/main.py#L67-L70 (this comment)
• .env.example#L79-L82
• infra/mvp/.env.production.example#L61-L64
• docs/AZURE_MVP_DEPLOY.md#L166-L166

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Repository: baasith6/camera-phase-1

Length of output: 3584

🌐 Web query:

Redis Redis-py TimeoutOperationError documentation operation failure retry backoff

💡 Result:

In the redis-py library, there is no exception named TimeoutOperationError. The standard exception for operation timeouts is redis.exceptions.TimeoutError [1][2]. Redis-py includes built-in, configurable support for retrying operations that fail due to transient errors, such as TimeoutError and ConnectionError [3][4]. Retry and Backoff Configuration: You can configure retry behavior by passing a Retry object to your Redis client instance [3][5]. This object allows you to specify a backoff strategy and the maximum number of retry attempts [6][3]. 1. Retry Instance: Defines how many times to retry and which exceptions trigger a retry [3]. 2. Backoff Strategy: Controls the delay between retry attempts. Common strategies include ExponentialBackoff, ExponentialWithJitterBackoff, and ConstantBackoff [7]. Using jitter (e.g., ExponentialWithJitterBackoff) is recommended to prevent thundering herd problems [3][7]. 3. Supported Errors: The Retry instance includes a supported_errors parameter to specify which exceptions should trigger a retry. By default, this typically includes ConnectionError and TimeoutError [6][3]. Example Configuration: Below is an example of how to configure a client with retry logic and exponential backoff: from redis import Redis from redis.retry import Retry from redis.backoff import ExponentialBackoff from redis.exceptions import ConnectionError, TimeoutError # Configure retry: 3 attempts, exponential backoff starting at 1 second, capped at 10 seconds retry_strategy = Retry(ExponentialBackoff(cap=10, base=1), 3) client = Redis( host='localhost', port=6379, retry=retry_strategy, retry_on_error=[ConnectionError, TimeoutError]) Default Behavior: As of recent versions (6.0.0+), redis-py automatically attempts a failed command three times by default using an exponential backoff strategy with jitter if no explicit retry configuration is provided [3]. Important Considerations: - Timeouts: Ensure your socket_timeout and socket_connect_timeout are set to appropriate values. Timeouts that are too short may trigger unnecessary retries for commands that would have succeeded, while excessively long timeouts can cause application threads to hang [3]. - Pipelines: Be aware that historical issues have been reported where retry logic did not behave as expected during pipeline execution [8]. Always verify behavior in your specific environment if using pipelines.

Citations:

• 1: https://redis.readthedocs.io/en/stable/exceptions.html
• 2: https://github.com/redis/redis-py/blob/88d16d0d/redis/exceptions.py
• 3: https://redis.io/docs/latest/develop/clients/redis-py/produsage/
• 4: https://redis.io/docs/latest/develop/clients/redis-py/error-handling/
• 5: https://oneuptime.com/blog/post/2026-03-31-redis-connection-management-best-practices/view
• 6: https://redis.readthedocs.io/en/stable/retry.html
• 7: https://redis.readthedocs.io/en/stable/backoff.html
• 8: Retrying on timeouts not working when executing Redis Pipeline redis/redis-py#2811

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Repository: baasith6/camera-phase-1

Length of output: 9382

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Inno Setup Compil32.exe ISCC.exe command line compiler GUI compiler

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Inno Setup provides two primary executables for compiling installation scripts: Compil32.exe and ISCC.exe. Both rely on the same core compilation engine (ISCmplr.dll) to generate installers [1]. Compil32.exe Compil32.exe is the GUI-based Integrated Development Environment (IDE) for Inno Setup [1]. It is primarily designed for developers to interactively write, edit, and compile installation scripts (.iss files) [1]. While it can be invoked from the command line using the /cc parameter (e.g., compil32 /cc "script.iss"), it is not intended for headless or silent automation, as it does not suppress the progress display or graphical error messages [2][3]. ISCC.exe ISCC.exe (Inno Setup Command-line Compiler) is a dedicated console-mode application specifically designed for command-line usage [2][4]. It is the recommended tool for build automation, continuous integration pipelines, and any scenario requiring silent or non-interactive compilation [5][4]. Key differences and features: - Usage: Use ISCC.exe for scripts, batch files, and automated build environments [5][4]. Use Compil32.exe for manual script development and editing [1]. - Silent Compilation: ISCC.exe supports quiet mode via the /Q or /Qp flags, allowing you to hide progress displays or suppress output except for error messages [2][4]. - Command-line Options: ISCC.exe accepts various parameters to override script directives at runtime, such as /O (output path), /F (output filename), and /S (SignTool configuration) [2][4]. It also supports extended parameters for the Inno Setup Preprocessor (ISPP) [6]. - Exit Codes: Both compilers return standard exit codes: 0 for success, 1 for invalid parameters/internal errors, and 2 for compilation failure [2][3]. For command-line automation, the standard practice is to use ISCC.exe [5][7]. You can verify available options by running iscc /? in your command prompt [5][4].

Citations:

• 1: https://deepwiki.com/jrsoftware/issrc
• 2: https://jrsoftware.org/ishelp/topic_compilercmdline.htm
• 3: https://documentation.help/inno-setup/topic_compilercmdline.htm
• 4: https://deepwiki.com/jrsoftware/issrc/4.1-command-line-compiler-(iscc)
• 5: https://stackoverflow.com/questions/16716366/how-to-compile-innosetup-script-in-silent-mode
• 6: https://jrsoftware.org/ishelp/topic_isppcc.htm
• 7: https://stackoverflow.com/questions/52391796/compile-inno-setup-project-through-a-batch-file-bat

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Repository: baasith6/camera-phase-1

Length of output: 238

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Repository: baasith6/camera-phase-1

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PowerShell & executable native program non-zero exit code does not stop script LASTEXITCODE

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By default, PowerShell does not stop execution when a native (external) executable returns a non-zero exit code [1][2]. This occurs because native programs operate outside of PowerShell's internal error-handling system, which typically relies on exceptions [1][3]. Instead, native programs report success or failure solely through the $LASTEXITCODE automatic variable, where 0 conventionally indicates success and non-zero values indicate failure [1][4][3]. To make your script stop automatically on a non-zero exit code, you have the following primary options: Option 1: Modern PowerShell (7.4+) In PowerShell 7.4 and later, you can enable native error integration by setting the $PSNativeCommandUseErrorActionPreference preference variable to $true [1][3]. When this is active, PowerShell treats non-zero exit codes as non-terminating errors that respect the $ErrorActionPreference variable [1][5]. By setting $ErrorActionPreference = 'Stop', these errors become script-terminating and will halt execution [1][6]. $PSNativeCommandUseErrorActionPreference = $true $ErrorActionPreference = 'Stop' & your-executable.exe Option 2: Explicit Check (Compatible with all versions) For versions older than 7.4, or if you prefer explicit control, you must manually check the exit code immediately after the command runs [2][7]. The most common approach is to verify $LASTEXITCODE or the success status variable $? [4][8]. & your-executable.exe if ($LASTEXITCODE -ne 0) { throw "Command failed with exit code $LASTEXITCODE" } Alternatively, you can use the $? variable, which is set to $true if the last operation succeeded (exit code 0) and $false otherwise [4][3]. & your-executable.exe if (-not $?) { throw "Command failed" } Summary of Key Variables: - $LASTEXITCODE: Stores the numeric exit code of the last native program [1][9]. - $?: A boolean that is true if the last operation (cmdlet or native program) succeeded, and false if it failed [4][3]. - $ErrorActionPreference: Determines how PowerShell reacts to errors; setting it to 'Stop' is critical for terminating execution automatically when using modern native command integration [1][3].

Citations:

• 1: https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_error_handling?view=powershell-7.6
• 2: https://stackoverflow.com/questions/9948517/how-to-stop-a-powershell-script-on-the-first-error
• 3: https://github.com/MicrosoftDocs/PowerShell-Docs/blob/main/reference/7.6/Microsoft.PowerShell.Core/About/about_Error_Handling.md
• 4: https://stackoverflow.com/questions/10666035/difference-between-and-lastexitcode-in-powershell
• 5: Native error handling: $PSNativeCommandUseErrorActionPreference = $true unexpectedly causes non-terminating, not statement-terminating errors PowerShell/PowerShell#18368
• 6: https://stackoverflow.com/questions/48864988/powershell-with-git-command-error-handling-automatically-abort-on-non-zero-exi
• 7: https://stackoverflow.com/questions/43260094/how-to-stop-power-shell-script-on-error
• 8: https://stackoverflow.com/questions/57468522/powershell-and-process-exit-codes
• 9: https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_automatic_variables?view=powershell-7.6

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Repository: baasith6/camera-phase-1

Length of output: 11928

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• Jenkinsfile#L15-L16 (this comment)
• docs/JENKINS_DEPLOY.md#L15-L16
• docs/JENKINS_DEPLOY.md#L94-L94

• scripts/deploy-vm.ps1#L86-L89 (this comment)
• connector/app/baked_config.py#L2-L2