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https://issues.apache.org/jira/browse/SOLR-16557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17656634#comment-17656634
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Jan Høydahl commented on SOLR-16557:
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I believe the answer to 1. is that you need to run Solr in Cloud mode to use
the package manager. But you can run a single-node Solr in cloud mode if you
like.
Wrt question 2. you'll have to direct your question to that project, it is not
part of Solr anymore.
There are many alternative ways of pushing data from various sources into Solr.
One is to write your own application to connect to DB and ingest to Solr, which
is often not a bad idea at all. In the past I have been using [Apache
ManifoldCF|https://manifoldcf.apache.org/release/release-2.24/en_US/end-user-documentation.html],
which has support for JDBC input and Solr output, but I don't know the state
of that project now, and probably overkill for just one DB source.
> Solr 9.0.0 - Not able to install 3rd party DIH plugin
> -----------------------------------------------------
>
> Key: SOLR-16557
> URL: https://issues.apache.org/jira/browse/SOLR-16557
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 9.0
> Reporter: Rajesh Kumar C
> Assignee: Ishan Chattopadhyaya
> Priority: Critical
>
> Hi Team,
>
> I have checked in IRC Channel & sent mail to User mailing list, as well. As
> there is no update, creating a ticket here.
>
> We were using the Solr 8.11.1 stand alone version for quite some time. To
> upgrade, I have just installed Java 11 & Solr 9.0.0. As I know DIH removed
> from Solr 9, I tried to install
> "[https://github.com/rohitbemax/dataimporthandler]"; 3rd party plugin
> suggested by Solr. It has support to install it through Package manager, but
> Package manager is not working in Solr Stand alone mode, getting below error
> when executing command provided in above 3rd party plugin.
> /opt/solr-9.0.0/bin/solr package add-repo data-import-handler
> "https://raw.githubusercontent.com/rohitbemax/dataimporthandler/master/repo/";
> Found 1 Solr nodes:
> Solr process 31961 running on port 8983
> org.apache.solr.common.SolrException: java.lang.NullPointerException
> at org.apache.solr.common.cloud.SolrZkClient.<init>(SolrZkClient.java:240)
> at org.apache.solr.common.cloud.SolrZkClient.<init>(SolrZkClient.java:135)
> at org.apache.solr.common.cloud.SolrZkClient.<init>(SolrZkClient.java:126)
> at org.apache.solr.common.cloud.SolrZkClient.<init>(SolrZkClient.java:96)
> at
> org.apache.solr.packagemanager.PackageManager.<init>(PackageManager.java:82)
> at org.apache.solr.util.PackageTool.runImpl(PackageTool.java:86)
> at org.apache.solr.util.SolrCLI$ToolBase.runTool(SolrCLI.java:169)
> at org.apache.solr.util.SolrCLI.main(SolrCLI.java:284)
> Caused by: java.lang.NullPointerException
> at
> org.apache.zookeeper.client.ConnectStringParser.<init>(ConnectStringParser.java:54)
> at
> org.apache.zookeeper.ZooKeeper.createDefaultHostProvider(ZooKeeper.java:1135)
> at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:734)
> at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:448)
> at
> org.apache.solr.common.cloud.SolrZooKeeper.<init>(SolrZooKeeper.java:43)
> at
> org.apache.solr.common.cloud.ZkClientConnectionStrategy.createSolrZooKeeper(ZkClientConnectionStrategy.java:115)
> at
> org.apache.solr.common.cloud.DefaultConnectionStrategy.connect(DefaultConnectionStrategy.java:35)
> at org.apache.solr.common.cloud.SolrZkClient.<init>(SolrZkClient.java:215)
> ... 7 more
> ERROR: java.lang.NullPointerException
>
> Also I have noticed that the above plugin has DIH JAR file upto Solr 8.10
> version, and does not have a DIH JAR file for Solr 9.0.0 version.
>
> So these are my questions.
>
> 1. How to install the above 3rd party DIH plugin in Solr 9.0.0 in "Stand
> alone mode"?
> 2. Does the above 3rd party plugin support Solr 9.0.0 version. If not, what
> is the workaround to use DIH in Solr 9.0.0?
> 3. Is there any other alternative (like DIH), to import data from database to
> Solr?
>
> Please advise on the above. Thank you.
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