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When installing Ubuntu or other 64 bit operating system on VirtualBox, you may receive the following error: "This kernel requires an x86-64 CPU, but only detected an i686 CPU. Unable to boot - please use a kernel appropriate for your CPU." To fix this error, recreate the virtual machine. On the “Create New Virtual Machine” [...] Read More...

I received the following exception, after making no code changes: org.apache.solr.common.SolrException: Length Required The issue is that CommonsHttpSolrServer does not send a Content-Length header in updates. The root cause of my issue was switching the front-end proxy from Apache to Nginx, which apparently is more strict about headers.   Read More...