Re: SolrCloud shows cluster still healthy even the node data directory is deleted
Hi community, I create a Solr Jira to track this issue. https://issues.apache.org/jira/browse/SOLR-15028 Regards, Amy From: Radar Lei Sent: Friday, November 20, 2020 5:13 PM To: solr-user@lucene.apache.org Subject: Re: SolrCloud shows cluster still healthy even the node data directory is deleted Hi Erick, I understand this is how the file handler works. But for the SolrCloud users, they didn't see the expected replica failover happens, then we can not say SolrCloud is totally HA enabled. Do we have plan to handle the HA for disk failures? Thanks. Regards, Radar From: Amy Bai Date: Wednesday, November 11, 2020 at 8:19 PM To: solr-user@lucene.apache.org Subject: Re: SolrCloud shows cluster still healthy even the node data directory is deleted Hi Erick, Thanks for your kindly reply. There are two things that confuse me: 1. index/search queries keep failing because one of the node data directory is gone, but the node is not marked as down. 2. The replicas on the failed node are not working, but the Index/search queries didn't failover to other healthy replicas. Regards, Amy From: Erick Erickson Sent: Monday, November 9, 2020 8:43 PM To: solr-user@lucene.apache.org Subject: Re: SolrCloud shows cluster still healthy even the node data directory is deleted Depends. *nix systems have delete-on-close semantics, that is as long as there’s a single file handle open, the file will be still be available to the process using it. Only when the last file handle is closed will the file actually be deleted. Solr (Lucene actually) has file handle open to every file in the index all the time. These files aren’t visible when you do a directory listing. So if you stop Solr, are the files gone? NOTE: When you start Solr again, if there are existing replicas that are healthy then the entire index should be copied from another replica…. Best, Erick > On Nov 9, 2020, at 3:30 AM, Amy Bai wrote: > > Hi community, > > I found that SolrCloud won't check the IO status if the SolrCloud process is > alive. > E.g. If I delete the SolrCloud data directory, there are no errors report, > and I can still log in to the SolrCloud Admin UI to create/query > collections. > Is this reasonable? > Can someone explain why SOLR handles it like this? > Thanks so much. > > > Regards, > Amy
Re: SolrCloud shows cluster still healthy even the node data directory is deleted
Hi Erick, Thanks for your kindly reply. There are two things that confuse me: 1. index/search queries keep failing because one of the node data directory is gone, but the node is not marked as down. 2. The replicas on the failed node are not working, but the Index/search queries didn't failover to other healthy replicas. Regards, Amy From: Erick Erickson Sent: Monday, November 9, 2020 8:43 PM To: solr-user@lucene.apache.org Subject: Re: SolrCloud shows cluster still healthy even the node data directory is deleted Depends. *nix systems have delete-on-close semantics, that is as long as there’s a single file handle open, the file will be still be available to the process using it. Only when the last file handle is closed will the file actually be deleted. Solr (Lucene actually) has file handle open to every file in the index all the time. These files aren’t visible when you do a directory listing. So if you stop Solr, are the files gone? NOTE: When you start Solr again, if there are existing replicas that are healthy then the entire index should be copied from another replica…. Best, Erick > On Nov 9, 2020, at 3:30 AM, Amy Bai wrote: > > Hi community, > > I found that SolrCloud won't check the IO status if the SolrCloud process is > alive. > E.g. If I delete the SolrCloud data directory, there are no errors report, > and I can still log in to the SolrCloud Admin UI to create/query > collections. > Is this reasonable? > Can someone explain why SOLR handles it like this? > Thanks so much. > > > Regards, > Amy
SolrCloud shows cluster still healthy even the node data directory is deleted
Hi community, I found that SolrCloud won't check the IO status if the SolrCloud process is alive. E.g. If I delete the SolrCloud data directory, there are no errors report, and I can still log in to the SolrCloud Admin UI to create/query collections. Is this reasonable? Can someone explain why SOLR handles it like this? Thanks so much. Regards, Amy
How to specify time zone in SOLR GC log?
Hi community, When I set solr time zone to Asia/Tokyo to specify solr log time. However, the solr gc log is still using my machine's default timezone. How to keep time zone in gc log consistent with solr log? Thanks.
How to disable Zookeeper ACL
Hi community, I enabled Zookeeper ACL according to https://lucene.apache.org/solr/guide/6_6/zookeeper-access-control.html. I wonder how to disable Zookeeper ACL?
Re: How to Password Protect Apache Solr Server Admin Pages in Solr cloud mode
Thanks so much for your kindly reply. Another question, I found that there is no login-screen in Solr 7.4. So, how can we support Admin UI protect in Solr 7.4 ? Regards, Amy On Fri, Apr 24, 2020 at 4:25 PM Jan Høydahl wrote: > Yes, please read the Reference Guide > > > https://lucene.apache.org/solr/guide/8_5/overview-of-the-solr-admin-ui.html#login-screen > > PS: Note that the Admin UI is just static public files and does not need > protection as such. But the Admin UI app in your browser will do HTTP > requests to Solr APIs, and when one of those returns a "401 Not Authorized" > response, you will be sent to the login screen to provide credentials. > > Jan > > > 24. apr. 2020 kl. 06:36 skrev Amy Bai : > > > > Hi community, > > > > I there any way to password protect apache solr server admin pages in > solr cloud mode? > > Something like when I open the server admin pages, there will be a login > page need user and password input. > > I learn that modify jetty.xml could work in standalone mode, how about > in solr cloud mode? > > Please feel free to reply, thanks! > > > > Regards, > > Amy > >
How to Password Protect Apache Solr Server Admin Pages in Solr cloud mode
Hi community, I there any way to password protect apache solr server admin pages in solr cloud mode? Something like when I open the server admin pages, there will be a login page need user and password input. I learn that modify jetty.xml could work in standalone mode, how about in solr cloud mode? Please feel free to reply, thanks! Regards, Amy
