異常嵌入式碼頭

Question

我運行的Solr 4.4.0嵌入式碼頭，但即時得到的follwoing異常運行的Solr：

3859 [coreLoadExecutor-3-thread-1] ERROR org.apache.solr.core.CoreContainer - null:java.lang.ExceptionInInitializerError 
at java.lang.Class.forName0(Native Method) 
at java.lang.Class.forName(Class.java:266) 
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:433) 
at org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:543) 
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) 
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) 
at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:467) 
at org.apache.solr.schema.IndexSchema.<init>(IndexSchema.java:164) 
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.CoreContainer.createFromLocal(CoreContainer.java:619) 
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:657) 
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:364) 
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:356) 
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) 
at java.util.concurrent.FutureTask.run(FutureTask.java:166) 
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) 
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) 
at java.util.concurrent.FutureTask.run(FutureTask.java:166) 
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:722) 
Caused by: java.lang.ClassCastException: class org.apache.lucene.analysis.ar.ArabicNormalizationFilterFactory 
at java.lang.Class.asSubclass(Class.java:3046) 
at org.apache.lucene.util.SPIClassIterator.next(SPIClassIterator.java:137) 
at org.apache.lucene.analysis.util.AnalysisSPILoader.reload(AnalysisSPILoader.java:79) 
at org.apache.lucene.analysis.util.AnalysisSPILoader.<init>(AnalysisSPILoader.java:60) 
at org.apache.lucene.analysis.util.AnalysisSPILoader.<init>(AnalysisSPILoader.java:49) 
at org.apache.lucene.analysis.util.TokenFilterFactory.<clinit>(TokenFilterFactory.java:31) 
... 27 more 

這是從Java代碼的主要方法：

public static void main(String[] args) throws Exception 
{ 
    Server server = new Server(8083); 
    WebAppContext webapp = new WebAppContext(); 
    webapp.setContextPath("/"); 
    webapp.setWar("C:\\Solr\\solr-4.4.0.war"); 
    server.setHandler(webapp); 
    System.setProperty("solr.solr.home", "C:\\solr"); 
    server.start(); 
    server.join(); 
} 

我們正在使用在這樣schema.xml中聲明的自定義字段類型（它的工作原理沒有這個字段類型）：

<fieldType name="zyfield" class="solr.TextField" positionIncrementGap="0" > 
<analyzer type="index"> 
    <!--<tokenizer class="solr.PatternTokenizerFactory" pattern="([\.0-9]+|@??[&amp;'a-zA-Z_0-9-]+(\.(net|ie|uk|com|txt))?)" group="1"/>--> 
    <tokenizer class="solr.PatternTokenizerFactory" pattern="(www|@??[-0-9\p{L}\p{Sc}]+?[-'0-9.\p{L}\p{Sc}&amp;]*[-0-9\p{L}]+?|[-0-9\p{L}\p{Sc}]+?)" group="1"/> 
    <filter class="solr.LowerCaseFilterFactory"/> 
    <filter class="ie.solrplugin.KDelimiterFilterFactory"/> 
    <filter class="ie.solrplugin.JunkTokenFilterFactory"/> 
    <filter class="solr.ASCIIFoldingFilterFactory"/> 
</analyzer> 
<analyzer type="query"> 
    <tokenizer class="solr.PatternTokenizerFactory" pattern="(www|@??[-0-9\p{L}\p{Sc}]+?[-'0-9.\p{L}\p{Sc}&amp;]*[-0-9\p{L}]+?|[-0-9\p{L}\p{Sc}]+?)" group="1"/> 
    <filter class="solr.LowerCaseFilterFactory"/> 
    <filter class="ie.solrplugin.KDelimiterFilterFactory"/> 
    <filter class="ie.solrplugin.JunkTokenFilterFactory"/> 
    <filter class="solr.ASCIIFoldingFilterFactory"/> 
</analyzer> 

Answer 1

您可能會在運行main方法的項目的類路徑和所有WebApp的類加載器隔離之間發生複雜性。

試着添加這個來告訴WebAppContext通過WebApp自己使用父類加載器。

public static void main(String[] args) throws Exception 
{ 
    Server server = new Server(8083); 
    WebAppContext webapp = new WebAppContext(); 
    webapp.setContextPath("/"); 
    webapp.setWar("C:\\Solr\\solr-4.4.0.war"); 
    webapp.setParentLoaderPriority(true);  // <-- this line 
    server.setHandler(webapp); 
    System.setProperty("solr.solr.home", "C:\\solr"); 
    server.start(); 
    server.join(); 
}