Updated stacktrace

ERROR - 2014-03-27 12:10:08.325; org.apache.solr.core.CoreContainer; Unable to create core: collection1
org.apache.solr.common.SolrException: Could not load core configuration for core collection1
	at org.apache.solr.core.ConfigSetService.getConfig(ConfigSetService.java:66)
	at org.apache.solr.core.CoreContainer.create(CoreContainer.java:554)
	at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:261)
	at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:253)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
Caused by: org.apache.solr.common.SolrException: Plugin init failure for [schema.xml] fieldType "text_general": Plugin init failure for [schema.xml] analyzer/filter: Error instantiating class: 'org.apache.lucene.analysis.core.StopFilterFactory'. Schema file is /home/hackers/trunk/solr/example/solr/collection1/schema.xml
	at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:618)
	at org.apache.solr.schema.IndexSchema.<init>(IndexSchema.java:168)
	at org.apache.solr.schema.IndexSchemaFactory.create(IndexSchemaFactory.java:55)
	at org.apache.solr.schema.IndexSchemaFactory.buildIndexSchema(IndexSchemaFactory.java:69)
	at org.apache.solr.core.ConfigSetService.createIndexSchema(ConfigSetService.java:89)
	at org.apache.solr.core.ConfigSetService.getConfig(ConfigSetService.java:62)
	... 9 more
Caused by: org.apache.solr.common.SolrException: Plugin init failure for [schema.xml] fieldType "text_general": Plugin init failure for [schema.xml] analyzer/filter: Error instantiating class: 'org.apache.lucene.analysis.core.StopFilterFactory'
	at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:177)
	at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:472)
	... 14 more
Caused by: org.apache.solr.common.SolrException: Plugin init failure for [schema.xml] analyzer/filter: Error instantiating class: 'org.apache.lucene.analysis.core.StopFilterFactory'
	at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:177)
	at org.apache.solr.schema.FieldTypePluginLoader.readAnalyzer(FieldTypePluginLoader.java:400)
	at org.apache.solr.schema.FieldTypePluginLoader.create(FieldTypePluginLoader.java:86)
	at org.apache.solr.schema.FieldTypePluginLoader.create(FieldTypePluginLoader.java:43)
	at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:151)
	... 15 more
Caused by: org.apache.solr.common.SolrException: Error instantiating class: 'org.apache.lucene.analysis.core.StopFilterFactory'
	at org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:604)
	at org.apache.solr.schema.FieldTypePluginLoader$3.create(FieldTypePluginLoader.java:382)
	at org.apache.solr.schema.FieldTypePluginLoader$3.create(FieldTypePluginLoader.java:376)
	at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:151)
	... 19 more
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:601)
	... 22 more
Caused by: java.lang.IllegalArgumentException: Unknown parameters: {enablePositionIncrements=true}
	at org.apache.lucene.analysis.core.StopFilterFactory.<init>(StopFilterFactory.java:89)
	... 27 more
ERROR - 2014-03-27 12:10:08.337; org.apache.solr.common.SolrException; null:org.apache.solr.common.SolrException: Unable to create core: collection1
	at org.apache.solr.core.CoreContainer.recordAndThrow(CoreContainer.java:911)
	at org.apache.solr.core.CoreContainer.create(CoreContainer.java:568)
	at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:261)
	at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:253)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
Caused by: org.apache.solr.common.SolrException: Could not load core configuration for core collection1
	at org.apache.solr.core.ConfigSetService.getConfig(ConfigSetService.java:66)
	at org.apache.solr.core.CoreContainer.create(CoreContainer.java:554)
	... 8 more
Caused by: org.apache.solr.common.SolrException: Plugin init failure for [schema.xml] fieldType "text_general": Plugin init failure for [schema.xml] analyzer/filter: Error instantiating class: 'org.apache.lucene.analysis.core.StopFilterFactory'. Schema file is /home/hackers/trunk/solr/example/solr/collection1/schema.xml
	at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:618)
	at org.apache.solr.schema.IndexSchema.<init>(IndexSchema.java:168)
	at org.apache.solr.schema.IndexSchemaFactory.create(IndexSchemaFactory.java:55)
	at org.apache.solr.schema.IndexSchemaFactory.buildIndexSchema(IndexSchemaFactory.java:69)
	at org.apache.solr.core.ConfigSetService.createIndexSchema(ConfigSetService.java:89)
	at org.apache.solr.core.ConfigSetService.getConfig(ConfigSetService.java:62)
	... 9 more
Caused by: org.apache.solr.common.SolrException: Plugin init failure for [schema.xml] fieldType "text_general": Plugin init failure for [schema.xml] analyzer/filter: Error instantiating class: 'org.apache.lucene.analysis.core.StopFilterFactory'
	at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:177)
	at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:472)
	... 14 more
Caused by: org.apache.solr.common.SolrException: Plugin init failure for [schema.xml] analyzer/filter: Error instantiating class: 'org.apache.lucene.analysis.core.StopFilterFactory'
	at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:177)
	at org.apache.solr.schema.FieldTypePluginLoader.readAnalyzer(FieldTypePluginLoader.java:400)
	at org.apache.solr.schema.FieldTypePluginLoader.create(FieldTypePluginLoader.java:86)
	at org.apache.solr.schema.FieldTypePluginLoader.create(FieldTypePluginLoader.java:43)
	at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:151)
	... 15 more
Caused by: org.apache.solr.common.SolrException: Error instantiating class: 'org.apache.lucene.analysis.core.StopFilterFactory'
	at org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:604)
	at org.apache.solr.schema.FieldTypePluginLoader$3.create(FieldTypePluginLoader.java:382)
	at org.apache.solr.schema.FieldTypePluginLoader$3.create(FieldTypePluginLoader.java:376)
	at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:151)
	... 19 more
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:601)
	... 22 more
Caused by: java.lang.IllegalArgumentException: Unknown parameters: {enablePositionIncrements=true}
	at org.apache.lucene.analysis.core.StopFilterFactory.<init>(StopFilterFactory.java:89)
	... 27 more