Title: Plugin get's 'blocked' by the server? Last modified: August 24, 2016 --- # Plugin get's 'blocked' by the server? * [Kramarz](https://wordpress.org/support/users/kramarz/) * (@kramarz) * [11 years, 3 months ago](https://wordpress.org/support/topic/plugin-gets-blocked-by-the-server/) * Hi Guys, * Up until couple of days ago, everything was working fine. Now out of the sudden, we weren’t able to update/add/remove anything from our website. Checking the server logs we found lots of errors related to ZenCache. Looks like something withing your plugin triggered some sort of restrictions on the server side. * We have removed ZenCache using ftp, what brought back the full functionality to the website. After that we have tried to install ZenCache again to investigate further. After installation plugin cannot be activated, with following error being throwed: * `Warning: fopen(/tmp/zencache-79953922.lock): failed to open stream: Permission denied in .../wp-content/plugins/zencache/includes/share.php on line 2015 Fatal error: Uncaught exception 'Exception' with message 'Unable to obtain an exclusive lock.' in .../wp-content/plugins/zencache/includes/share.php:2016 Stack trace:# 0 .../wp-content/plugins/zencache/zencache.inc.php(2223): zencache\share->cache_lock()# 1 .../wp-content/plugins/zencache/zencache.inc.php(349): zencache\plugin->add_advanced_cache()# 2 [internal function]: zencache\plugin->activate('') #3 .../wp-includes/plugin. php(496): call_user_func_array(Array, Array) #4 .../wp-admin/plugins.php(155): do_action('activate_zencac...') #5 {main} thrown in .../wp-content/plugins/zencache/ includes/share.php on line 2016` * Any ideas? * [https://wordpress.org/plugins/zencache/](https://wordpress.org/plugins/zencache/) Viewing 2 replies - 1 through 2 (of 2 total) * Thread Starter [Kramarz](https://wordpress.org/support/users/kramarz/) * (@kramarz) * [11 years, 3 months ago](https://wordpress.org/support/topic/plugin-gets-blocked-by-the-server/#post-6095193) * An Update. * Raised a ticked with hosting company as I thought maybe they changed something in server settings, but they didn’t. * They did some research though and pointed me at this link on GitHub – [https://github.com/websharks/zencache/issues/373](https://github.com/websharks/zencache/issues/373) * Still in dark, as to how to solve the issue. * Help appreciated. * Plugin Author [Raam Dev](https://wordpress.org/support/users/raamdev/) * (@raamdev) * [11 years, 2 months ago](https://wordpress.org/support/topic/plugin-gets-blocked-by-the-server/#post-6095334) * [@kramarz](https://wordpress.org/support/users/kramarz/) That error message indicates one of two things: you’re either not running PHP v5.3.2+, or the server you’re hosted on is not properly supporting file locking. Some hosting companies that use cloud-based storage systems, or NFS systems, can have issues with file locking. * We haven’t seen any issues with all of the major hosting providers, so if your hosting company is not able to help you solve that issue you may want to consider switching web hosts. Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘Plugin get's 'blocked' by the server?’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/zencache_3c4c6b.svg) * [ZenCache](https://wordpress.org/plugins/zencache/) * [Frequently Asked Questions](https://wordpress.org/plugins/zencache/#faq) * [Support Threads](https://wordpress.org/support/plugin/zencache/) * [Active Topics](https://wordpress.org/support/plugin/zencache/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/zencache/unresolved/) * [Reviews](https://wordpress.org/support/plugin/zencache/reviews/) * 2 replies * 2 participants * Last reply from: [Raam Dev](https://wordpress.org/support/users/raamdev/) * Last activity: [11 years, 2 months ago](https://wordpress.org/support/topic/plugin-gets-blocked-by-the-server/#post-6095334) * Status: not resolved