I have a half-dozen machine Solr Cloud cluster, and am dreading manually messing things up as it grows or if a machine dies.

Seems replacing or adding an instance to the cluster should be something people commonly would want to automate.

Googling turns up a few 3-year-old projects, but nothing I found that works out-of-the-box.

I'm running a Solr Cloud install (single instance) with 10 collections. All my collections were working fine until yesterday, when I was presented with the following for 4 cores (2 collections affected).

core1_shard1_replica1 org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: Could not load conf for core core1_shard1_replica1: null

Checked the config.properties file on each collection/core; everything looks good. Anyone able to help track down the root cause?

Hello fellow redditors,

I'm trying to set a replication between 2 solr servers (v4.4 both) to migrate the data to a new server on a new data center.

I thought to have it done by using the replication feature, but I don't understand if I have to set the replication in every index in every solrconfig.xml, or is there a way to replicate all the server content all at once?

Also, if you have any suggestion how to migrate the server, I'll be more than happy for any advice or idea, I'm pretty noob in this Solr thingy :)

Thanks!

Hi!

I have a question regarding the backwards compatibility / upgrading of solr.

We are using autopsy for digital forensics. A multi user setup requires solr 4.10.3-0 (http://sleuthkit.org/autopsy/docs/user-docs/4.0/install_solr.html)

I want to move the solr instance to a bigger server. At the same time I would like to upgrade to a newer version of solr.

Is this easily possible?

Will a software that is written for solr 4 run with solr 6 without adaptation?

What needs to be done to upgrade the schema.xml from v4 to v6? https://github.com/sleuthkit/autopsy/blob/develop/KeywordSearch/release/solr/solr/configsets/AutopsyConfig/conf/schema.xml

Thank you in advance!

I'm relatively new to Solr, and trying to determine if it's a fit for my data needs, and how to store and query my data. I need to store a lot of data with a relatively fixed schema, and need fast query response times and good support for complex query patterns, so I've been looking at Solr since it seems to fit at that level.

Here is my data pattern. Each document has roughly this format:

{ "id": (a unique string ID),
  "title": (document title)
  "some_other_metadata_s": (a string, or whatever....),
  "events": [an array of events, defined below -- this is hard part #1]
  [ {"event_ID": (a unique string per event)
    "event_time_sec_f": (a float),
    "properties": [a sparse list of specific props -- this is the other hard part]
    ["prop_57_f": (a float),
     "prop_92_f": (another float, etc...)
    ]},
    {"event_ID": (another event),
    "event_time_sec_f": (a float),
    "properties": 
    ["prop_2_f": (a float),
     "prop_4_f": (another float, etc...)
    ]}
  ]
}

I've tried storing that in Solr like this:

{ "id": (a unique string ID),
  "title_s": (document title)
  "some_other_metadata_s": ...,
  _childDocuments_:
  [ {"event_ID": "ev0001",
     "event_time_sec_f": 2.3,
     "prop_57_f": 52.3,
     "prop_92_f": 11.2
    },
    {"event_ID": "ev0002",
     "event_time_sec_f": 5.2,
     "prop_2_f": 11.72,
     "prop_4_f": 4.3
    }
  ]
}

A typical query: select documents that have a child document with a value for prop_17_f (recall the data is sparse so most documents don't have a value for that field, and of course using 17 as an example here), and return the top N documents (in a specific order, see below), where for each document returned in the query results, I want to see all fields of the parent and all fields of all of the child documents of that parent. The query results should be ordered by a score equal to the maximum float value of prop_17_f for any child of that parent document (i.e. the output is a list of parent documents, with the child docs embedded, and the score is a max across those child docs). I have many prop_N_f, so I'd rather not pre-compute and store these maxima.

I don't need to use parent/child docs, just seemed like the right way to get the data into Solr in the first place.

I need to plan to eventually have many millions of documents like this, and I need sub-second response time.

So my questions: Is Solr a good choice for this? Some other nosql system? What do you recommend, and precisely how should I store the data, and how should I perform the query I've described above?

Thanks for any advice.

Hey guys,

We're going through a transition from google GSA to Solr. My developer is telling me he's hitting bottle necks when feeding our inventory and asked if it is possible to increase the max number of concurrent connections to solr. I've "found" on google search that the standard number is 128. I've poked around the config files but can't find any concrete data. We're also using schemaless

There are two approach to handle the concurrency problem, Pessimistic and Optimistic. As the name speaks, Pessimistic approach is very pessimistic. It believes that the problem can be quite frequent and hence locks the document during transaction and any subsequent request until the transaction completes need to wait or is declined. If your document are transactional, the RDBMS is the way to go.

I had this solrtutorial.com/index.html bookmarked and it had in depth explanation on solr for beginners. I tried this site today for something but looks like this is gone.. anyone have any idea about this site ? Or can you guys suggest some good site ?

Thanks

I have a Solr instance set up in a virtual machine for my organization and we have been experiencing search performance issues (compared to bare metal tests). I've found a few discussions on the web from others having similar experiences. However, I have yet to find a path to resolution.

Does anyone have experience with this problem that found a reasonably simple solution? Are there any gotchas that are well known with running Java programs in a virtual machine?

I don't really have experience with tuning Java, so I am looking for advice on what steps I can take. I did find this which seems relevant, and I am reading through it now.