Hi, Sarath and Madhan
Your analysis makes sense.
I did a quick test. From gremlin shell: gremlin> graph.getConfiguration().getLocalConfiguration().getProperty('index.search.solr.zookeeper-url') It only returns the first server out of the three servers in
'index.search.solr.zookeeper-url' from the property file. On the other hand, gremlin> graph.getConfiguration().getLocalConfiguration().getProperty('storage.hostname')
returns the list of three zookeeper servers for the hbase property. storage.hostname is a String[] config option.
We need to fix it, as you suggested.
Thanks for digging into it.
Jerry
On Tue, Oct 2, 2018 at 2:34 PM, <madhan....@...> wrote: The issue is trigged by CommonsConfigurations implementation, which calls getString(key) for String type values. When the value for the key is an array, getString(key) returns the first element - which causes JanusGraph to use only the first zookeeper host:port.
Changing SolrIndex.ZOOKEEPER_URL from "String" to "String[]" will end up calling getStringArray() , which will return all entries of the array.
On Tuesday, October 2, 2018 at 2:19:21 PM UTC-7, Sarath Subramanian wrote: Jerry,
final String zookeeperUrl = config.get(SolrIndex.ZOOKEEPER_URL);
Always fetches single string value, even if comma-separated zookeeper host values are specified.
Maybe the fix is changing the data type from String to String array below?
public static final ConfigOption<String> ZOOKEEPER_URL = new ConfigOption<>(SOLR_NS,"zookeeper-url", "URL of the Zookeeper instance coordinating the SolrCloud cluster", ConfigOption.Type.MASKABLE, "localhost:2181");
Thanks, Sarath On Friday, September 28, 2018 at 12:03:24 PM UTC-7, Jerry He wrote: I think JanusGraph simply passes the
zookeeper-url string to the Solr cloud client without doing any parsing, and the string format is what Solr needs. It is strange and puzzling that Solr's use of zookeeper client is not doing the re-connect. Zookeeper client itself would do the fail-over reconnect (assume the correct servers and parameters are given to it).
Thanks,
Jerry On Thu, Sep 27, 2018 at 10:03 PM, Apoorv Naik <na...@...> wrote: Yes this is exactly what we're doing but if the first ZK server in the ensemble goes down the server runs into an endless retry loop, doesn't failover to other hosts at all.
On Thu, Sep 27, 2018 at 9:58 PM Jerry He < je...@...> wrote: Hi, Apoorv
Try:
index.search.solr.zookeeper-url=aid1:2181/solr,aid2:2181/solr,aid3:2181/solr
Replace hostnames and other info, with the members in you assemble.
Thanks,
Jerry On Thu, Sep 27, 2018 at 9:14 PM, Apoorv Naik <na...@...> wrote: Hi Jerry,
I've a cluster where I've three Zookeepers deployed ( single ensemble) , the moment the first one goes down the Janusgraph instance becomes unusable and goes into an exception loop. So what I was trying to achieve was a failover to the other zookepeer server in the ensemble.
On Thursday, September 27, 2018 at 9:02:41 PM UTC-7, Jerry He wrote:Hi, Apoorv
Can you explain what you want? Do you mean multiple servers for a Zookeeper ensemble by 'multiple zookeeper instances'? Or you mean multiple ensembles?
Thanks,
Jerry
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