I stuck in 5.3.1 because if upgrade to 5.5 or 6.x my cluster dies. Doing a rolling upgrade, when I upgrade the second node to 5.5 both die in the per-sync phase, I don't know what changes in 5.5 but it's demanding a huge quantity of memory to check if the replica it's in sync. This kind of stuff and the full re-index (12T) between major releases are indeed a pain. Cryptical errors and a deficient system to get metrics from what it's going on inside the cluster is another issue, I'm unable to get the throughput in a collection as a whole, the number of http connection in each node, the utilization of the jetty thread pool and stuff like that. Solr is a great tool, but it's hard, too hard to get in. \--
/Yago Riveiro  On Sep 13 2016, at 10:46 am, Alessandro Benedetti <abenede...@apache.org> wrote: > First of all I second Bram, I am sorry you had a bad experience with Solr, but I think that: \- without a minimum study and documentation \- without trying to follow the best practices I think you are going to have a "miserable" experience with any software, don't you ? > > In addition to Bram : > > On Mon, Sep 12, 2016 at 10:48 PM, Aaron Greenspan < aaron.greens...@plainsite.org> wrote: > > It didn’t say which field type. Buried in the logs I found a reference in > the Java stack trace—which *disappears* (and distorts the viewing window > horribly) after a few seconds when you try to view it in the web log UI—to > the string "units="degrees"". > > > This si a bug, and it is really annoying, not sure anyone already raised it, if not I suggest you to do that :) But you can use the logs themselves without any problem. > > > > Apparently there is some aspect of the Thai text field type that Solr > 6.2.0 doesn’t like. So I disabled it. I don’t use Thai text. > > > If you were not using the Thai text, why had you the Thai Text field type defined ? Keep It Simple Stupid is the way :) I find tons of Solr instances in production mith monster solrconfig.xml and schema.xml. basically the old default ones, without any particular reason. Don't do that ! > > > > Now Solr was complaining about "Error loading class > 'solr.admin.AdminHandlers'". So I found the reference to > solr.admin.AdminHandlers in solrconfig.xml for each of my cores and > commented it out. Only then did Solr work again. > > > Seems to be you didn't take care of reading the update release notes, did you ? > > Cheers \-- \-------------------------- > > Benedetti Alessandro Visiting card : [http://about.me/alessandro_benedetti](http://about.me/alessan dro_benedetti&r=c29sci11c2VyQGx1Y2VuZS5hcGFjaGUub3Jn) > > "Tyger, tyger burning bright In the forests of the night, What immortal hand or eye Could frame thy fearful symmetry?" > > William Blake - Songs of Experience -1794 England
