Why Does My Selenium Script Throw a \'session deleted because of page crash\' Error?

Session Deletion Error Due to Page Crash

Introduction

ChromeDriver users have encountered an enigmatic error message while utilizing Selenium and Cron tasks. The error manifests as, "unknown error: session deleted because of page crash from unknown error: cannot determine loading status from tab crashed". This article investigates the cause of this error and provides possible solutions.

Error Analysis

The pivotal error message is:

selenium.common.exceptions.WebDriverException: Message: unknown error: session deleted because of page crash
from unknown error: cannot determine loading status
from tab crashed

Scrutiny of the error message and code snippets reveals a correlation with the issue referred to as "from tab crashed".

Solution

Several solutions have been proposed:

1. Add --no-sandbox to the Chrome options.
2. Mount /dev/shm to a larger size or share it with the host using -v /dev/shm:/dev/shm.
3. Disable dev SHM usage: chrome_options.add_argument('--disable-dev-shm-usage').

Fix for "From Tab Crashed"

The "from tab crashed" issue stemmed from a Linux issue where the system attempted to use /dev/shm for non-executable memory. Fixes have been implemented in subsequent Chrome versions.

Reference

• [Linux: Chrome/Chromium SIGBUS/Aw, Snap! on small /dev/shm](https://bugs.chromium.org/p/chromium/issues/detail?id=736452)
• [org.openqa.selenium.SessionNotCreatedException: session not created exception from tab crashed error when executing from Jenkins CI server](https://github.com/SeleniumHQ/selenium/issues/4542)

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