[ 
https://issues.apache.org/jira/browse/SOLR-12283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16504386#comment-16504386
 ] 

Shawn Heisey commented on SOLR-12283:
-------------------------------------

Indeed, it looks like DIH doesn't work if its jar is loaded via the .system 
collection.

If I do this the way you did, setting it up on Windows 10 with the cloud 
example in solr 7.3.0, running curl remotely on a Linux machine, I get a 
similar, but not absolutely identical, problem.  Different line number for the 
NPE, but much the same issue.

{noformat}
ERROR - 2018-06-07 07:49:04.817; [c:foo s:shard1 r:core_node2 
x:foo_shard1_replica_n1] org.apache.solr.common.SolrException; Full Import 
failed:org.apache.solr.handler.dataimport.DataImportHandlerException: Unable to 
PropertyWriter implementation:ZKPropertiesWriter
        at 
org.apache.solr.handler.dataimport.DataImporter.createPropertyWriter(DataImporter.java:339)
        at 
org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:420)
        at 
org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:483)
        at 
org.apache.solr.handler.dataimport.DataImporter.lambda$runAsync$0(DataImporter.java:466)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
        at 
org.apache.solr.handler.dataimport.DocBuilder.loadClass(DocBuilder.java:941)
        at 
org.apache.solr.handler.dataimport.DataImporter.createPropertyWriter(DataImporter.java:335)
        ... 4 more
{noformat}

Then I got rid of that collection and the .system collection, created a lib 
directory in each of the solr homes for the example nodes, copied the two jars 
to those lib directories, restarted everything, made a NEW collection with the 
handler, and tried again.  This time DIH itself worked and it was the MySQL 
connection that failed.

{noformat}
ERROR - 2018-06-07 08:00:42.981; [c:bar2 s:shard1 r:core_node2 
x:bar2_shard1_replica_n1] org.apache.solr.common.SolrException; Exception while 
processing: events_Gesloc document : SolrInputDocument(fields: 
[]):org.apache.solr.handler.dataimport.DataImportHandlerException: Unable to 
execute query: SELECT id from view_indexation_advertisements Processing 
Document # 1
        at 
org.apache.solr.handler.dataimport.DataImportHandlerException.wrapAndThrow(DataImportHandlerException.java:69)
        at 
org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:327)
        at 
org.apache.solr.handler.dataimport.JdbcDataSource.createResultSetIterator(JdbcDataSource.java:288)
        at 
org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:283)
        at 
org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:52)
        at 
org.apache.solr.handler.dataimport.SqlEntityProcessor.initQuery(SqlEntityProcessor.java:59)
        at 
org.apache.solr.handler.dataimport.SqlEntityProcessor.nextRow(SqlEntityProcessor.java:73)
        at 
org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:267)
        at 
org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:476)
        at 
org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:415)
        at 
org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:330)
        at 
org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:233)
        at 
org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:424)
        at 
org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:483)
        at 
org.apache.solr.handler.dataimport.DataImporter.lambda$runAsync$0(DataImporter.java:466)
        at java.lang.Thread.run(Thread.java:748)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 
Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The 
driver has not received any packets from the server.
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
        at 
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990)
        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:342)
        at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2188)
        at 
com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2221)
        at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2016)
        at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:776)
        at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
        at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
        at 
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
        at 
org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:192)
        at 
org.apache.solr.handler.dataimport.JdbcDataSource$1.call(JdbcDataSource.java:172)
        at 
org.apache.solr.handler.dataimport.JdbcDataSource.getConnection(JdbcDataSource.java:528)
        at 
org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:317)
        ... 14 more
Caused by: java.net.UnknownHostException: srv-gesloc-sql
        at java.net.InetAddress.getAllByName0(InetAddress.java:1280)
        at java.net.InetAddress.getAllByName(InetAddress.java:1192)
        at java.net.InetAddress.getAllByName(InetAddress.java:1126)
        at 
com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:188)
        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:301)
        ... 30 more
{noformat}

This is quite odd.  It looks like a classloader issue, but I would have 
expected the same problem either way, because in both cases, the jar is loaded 
by runtime classloaders.


> Unable To Load ZKPropertiesWriter when dih.jar is added as runtimelib BLOB in 
> .system collection
> ------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-12283
>                 URL: https://issues.apache.org/jira/browse/SOLR-12283
>             Project: Solr
>          Issue Type: Test
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: contrib - DataImportHandler
>    Affects Versions: 6.6.1, 7.3
>         Environment: Debian
> SolrCloud
>            Reporter: Maxence SAUNIER
>            Priority: Blocker
>         Attachments: modified-DIH.zip, modified-DIH.zip, 
> mysql-connector-java-5.1.46-bin.jar, mysql-connector-java-5.1.46.jar, 
> request_handler_config.json, solr-core-7.3.0.jar, 
> solr-dataimporthandler-7.3.0.jar, solr-dataimporthandler-extras-7.3.0.jar, 
> solr-solrj-7.3.0.jar, solr.log, solr.log, solr.log, solr.log
>
>
> Hello,
> It's been 2 weeks that I try to correct this problem with the community 
> user-solr but no success. I seriously wonder if this is not a problem in the 
> code. I do not have the impression that many people use DIH with Solr's cloud 
> version.
> On Internet, no similar problem.
> For information, the following configuration of DIH comes from DIHs that work 
> in production on a single Solr server. The connections to the databases are 
> therefore correct.
> *Errors messages:*
> {panel:title=DataImporter}
> {code:java}
> Full Import 
> failed:org.apache.solr.handler.dataimport.DataImportHandlerException: Unable 
> to PropertyWriter implementation:ZKPropertiesWriter
>       at 
> org.apache.solr.handler.dataimport.DataImporter.createPropertyWriter(DataImporter.java:339)
>       at 
> org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:420)
>       at 
> org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:483)
>       at 
> org.apache.solr.handler.dataimport.DataImportHandler.handleRequestBody(DataImportHandler.java:183)
>       at 
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:195)
>       at org.apache.solr.core.SolrCore.execute(SolrCore.java:2503)
>       at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:711)
>       at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:517)
>       at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:384)
>       at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:330)
>       at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1629)
>       at 
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
>       at 
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
>       at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
>       at 
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
>       at 
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
>       at 
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
>       at 
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
>       at 
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
>       at 
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)
>       at 
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
>       at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>       at 
> org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
>       at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>       at org.eclipse.jetty.server.Server.handle(Server.java:530)
>       at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
>       at 
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
>       at 
> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
>       at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
>       at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
>       at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
>       at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
>       at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
>       at 
> org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
>       at 
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
>       at 
> org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
>       at java.lang.Thread.run(Thread.java:748)
> Caused by: java.lang.NullPointerException
>       at 
> org.apache.solr.handler.dataimport.DocBuilder.loadClass(DocBuilder.java:935)
>       at 
> org.apache.solr.handler.dataimport.DataImporter.createPropertyWriter(DataImporter.java:335)
>       ... 42 more
> {code}
> {panel}
> {panel:title=RequestHandlerBase}
> {code:java}
> java.lang.NullPointerException
>       at 
> org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:429)
>       at 
> org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:483)
>       at 
> org.apache.solr.handler.dataimport.DataImportHandler.handleRequestBody(DataImportHandler.java:183)
>       at 
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:195)
>       at org.apache.solr.core.SolrCore.execute(SolrCore.java:2503)
>       at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:711)
>       at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:517)
>       at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:384)
>       at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:330)
>       at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1629)
>       at 
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
>       at 
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
>       at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
>       at 
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
>       at 
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
>       at 
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
>       at 
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
>       at 
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
>       at 
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)
>       at 
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
>       at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>       at 
> org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
>       at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>       at org.eclipse.jetty.server.Server.handle(Server.java:530)
>       at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
>       at 
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
>       at 
> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
>       at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
>       at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
>       at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
>       at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
>       at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
>       at 
> org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
>       at 
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
>       at 
> org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
>       at java.lang.Thread.run(Thread.java:748)
> {code}
> {panel}
> {panel:title=HttpSolrCall}
> {code:java}
> null:java.lang.NullPointerException
>       at 
> org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:429)
>       at 
> org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:483)
>       at 
> org.apache.solr.handler.dataimport.DataImportHandler.handleRequestBody(DataImportHandler.java:183)
>       at 
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:195)
>       at org.apache.solr.core.SolrCore.execute(SolrCore.java:2503)
>       at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:711)
>       at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:517)
>       at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:384)
>       at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:330)
>       at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1629)
>       at 
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
>       at 
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
>       at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
>       at 
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
>       at 
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
>       at 
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
>       at 
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
>       at 
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
>       at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
>       at 
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)
>       at 
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
>       at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>       at 
> org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
>       at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>       at org.eclipse.jetty.server.Server.handle(Server.java:530)
>       at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
>       at 
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
>       at 
> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
>       at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
>       at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
>       at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
>       at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
>       at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
>       at 
> org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
>       at 
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
>       at 
> org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
>       at java.lang.Thread.run(Thread.java:748)
> {code}
> {panel}
> *Process to reproduce the problem:*
> Create .system collection for the BLOB
> {code}
> curl http://localhost:8983/solr/admin/collections?action=CREATE&name=.system
> {code}
> Add Data Import Handler JAR file.
> {code}
> curl -X POST -H 'Content-Type: application/octet-stream' --data-binary 
> @solr-dataimporthandler-7.3.0.jar 
> http://localhost:8983/solr/.system/blob/data-import-handler
> {code}
> Add the runtime lib on the configoverlay.json with the API
> {code}
> curl http://localhost:8983/solr/unicorn/config -H 
> 'Content-type:application/json' -d '{"add-runtimelib": { 
> "name":"data-import-handler", "version":1 }}'
> {code}
> Send mysql connector on the blob. I have test with the connector-bin.jar but 
> I have the same error.
> {code}
> curl -X POST -H 'Content-Type: application/octet-stream' --data-binary 
> @mysql-connector-java-5.1.46.jar 
> http://localhost:8983/solr/.system/blob/mysql-connector-java
> {code}
> Add runtime
> {code}
> curl http://localhost:8983/solr/unicorn/config -H 
> 'Content-type:application/json' -d '{"add-runtimelib": { 
> "name":"mysql-connector-java", "version":1 }}'
> {code}
> Personally, I create a DIH folder on the collection config path on the cloud. 
> It's not necessary.
> And I put the DIH config file on the cloud with the zkcli (it's a personnal 
> script to overload the zkcli.sh on Solr but it's the same result. My file is 
> on the cloud.)
> {code}
> ./zkcli.py putfile /configs/unicorn/DIH/ DIH/indexation_events.xml
> {code}
> Add request handler config:
> {code}
> curl -X POST http://{solr_server}:8983/solr/{collection_name}/config -H 
> 'Content-type:application/json' -d '
> {
>   "add-requesthandler":
>   {
>     "name": "/test-dih",
>     "class": "org.apache.solr.handler.dataimport.DataImportHandler",
>     "runtimeLib": true,
>     "version": 1,
>     "defaults":
>     {
>       "config": "DIH/indexation_events.xml"
>     }
>   }
> } '
> {code}
> Reload the config:
> {code}
> curl 
> http://localhost:8983/solr/unicorn/test-dih?command=reload-config&commit=true&debug=true
> {code}
> Import and have error:
> {code}
> curl 
> http://localhost:8983/solr/unicorn/test-dih?command=full-import&commit=true&debug=true
> {code}
> I have test to add on request handler and BLOB this jar files but not change:
> # data-import-handler-extras
> # solr-core
> # solr-solrj
> I have join all files used in this process.
> Thansk you.



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