In exploring the issue of SSE subscription failures in OpenHAB, particularly the error message ‘SSE subscription failed: running in fallback mode,’ it’s clear that the problem arises from the accumulation of stale subscriptions. The logs indicate that even after closing browser windows, subscriptions remain active, contributing to the 50-subscription limit being reached.
To address this, consider the following steps:
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Adjust Subscription Limits: Increasing the maximum allowed subscriptions in OpenHAB’s configuration might provide temporary relief, though this is not a long-term solution.
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Optimize Sitemap Navigation: Reducing rapid page switches and simplifying the sitemap structure can minimize unnecessary subscriptions, thus lowering the load on the system.
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Browser Management: Clearing browser caches or fully restarting the browser can help release lingering subscriptions, freeing up resources.
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System Configuration Review: Examining OpenHAB’s cleanup mechanisms and ensuring they function optimally can prevent stale subscriptions from persisting.
By implementing these strategies, users can mitigate the SSE subscription issue and enhance the stability of their OpenHAB setup.