I've created a what I believe to be a simple SOLR cluster, with Zookeeper (external binaries instead of the embeded). For simplicity, this cluster is:

Master: SOLR1 Slave: SOLR2

Both device have Zookeeper running on them until I start to bridge out into other devices.

SOLR is set to start with -Denable.master=true and -Denable.slave=true and include the -z host flag as per the instructions. I can see my index being generated, and now on my slave node within the SOLR admin console, I get the following error:

SolrCore Initialization Failures fts_en: org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: Error loading class 'org.apache.solr.request.XSLTResponseWriter' Please check your logs for more information

My index is called fts_en. On the slave node, if I review the log files, I get the following information:

2016-01-05 17:06:55.836 ERROR (coreContainerWorkExecutor-2-thread-1-processing-n: [ ] o.a.s.c.CoreContainer Error waiting for SolrCore to be created java.util.concurrent.ExecutionException: org.apache.solr.common.SolrException: Unable to create core [fts_en] at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.solr.core.CoreContainer$2.run(CoreContainer.java:491) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor$1.run(ExecutorUtil.java:232) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.solr.common.SolrException: Unable to create core [fts_en] at org.apache.solr.core.CoreContainer.create(CoreContainer.java:756) at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:462) at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:453) ... 5 more Caused by: org.apache.solr.common.SolrException: Error loading class 'org.apache.solr.request.XSLTResponseWriter' at org.apache.solr.core.SolrCore.(SolrCore.java:824) at org.apache.solr.core.SolrCore.(SolrCore.java:665) at org.apache.solr.core.CoreContainer.create(CoreContainer.java:742) ... 7 more

I cannot work out why, can anyone assist please?

Centos 6.5 SOLR 5.4.0 Zookeeper: 3.4.7

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