我从运行 Lucene 中得到以下错误跟踪。我包括提示错误的代码段。具体的项目/连接器是Lucene for Appengine
代码
public static void resetAllIndicesUsingDatastore() {
LOG.info("Inside resetAllIndicesUsingDatastore ");
StandardAnalyzer analyzer = new StandardAnalyzer();
GaeDirectory directory = new GaeDirectory(LuceneWorker.DOGS);// create dog index
IndexWriterConfig config = GaeLuceneUtil.getIndexWriterConfig(LuceneWorker.LUCENE_VERSION, analyzer);
IndexWriter writer = null;
LOG.info("GOING TO TRY ");
try {
// delete all elements
writer = new IndexWriter(directory, config);//LINE 142
LOG.info("Going to delete all that's there ");
writer.deleteAll();
writer.commit();
// get all dogs from datastore
List<Dog> dogs = DogDaoImpl.getAll();
LOG.info("All dogs size is : " + dogs.size());
for (Dog p : dogs) {
LuceneIndexDogTaskQueue.indexDog(p.getDogId());
LOG.info("Dog sent to ask queue for lucene is : " + p.getTitle() + " with id: " + p.getDogId());
}
LOG.info("Leaving resetAllIndicesUsingDatastore with no error ");
} catch (IOException e) {
LOG.info("Leaving resetAllIndicesUsingDatastore with ERROR " + e.getLocalizedMessage() + " msg:: " + e.getMessage());
e.printStackTrace();
} finally {
if (null != writer) {
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
错误
com.google.api.server.spi.SystemService invokeServiceMethod: cause={0}
java.lang.NullPointerException
at com.googlecode.luceneappengine.SegmentIndexInput.readByte(SegmentIndexInput.java:70)
at org.apache.lucene.store.BufferedChecksumIndexInput.readByte(BufferedChecksumIndexInput.java:41)
at org.apache.lucene.store.DataInput.readInt(DataInput.java:98)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:347)
at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:458)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:913)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:759)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:454)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:783)
at com.company.dogappcloud.taskqueue.lucene.LuceneSearchDog.resetAllIndicesUsingDatastore(LuceneSearchDog.java:142)
//remaining of trace but not as important
at com.company.dogappcloud.dogappApi.findDog(dogappApi.java:968)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:45)
at com.google.api.server.spi.SystemService.invokeServiceMethod(SystemService.java:359)
at com.google.api.server.spi.SystemServiceServlet.execute(SystemServiceServlet.java:160)
at com.google.api.server.spi.SystemServiceServlet.doPost(SystemServiceServlet.java:118)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.googlecode.objectify.cache.AsyncCacheFilter.doFilter(AsyncCacheFilter.java:58)
at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:437)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:444)
at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:230)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:308)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:300)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:441)
at java.lang.Thread.run(Thread.java:745)
这是我的appengine-web.xml文件，我也按照建议使用修改后的文件RamUsageEstimator
<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application>myApplicationId</application>
<version>1</version>
<threadsafe>true</threadsafe>
<system-properties>
<property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
<property name="java.util.logging.config.file"
value="WEB-INF/java-util-logging.properties"/>
<property name="os.version" value="1.0.GAE whatever"/>
<property name="os.arch" value="GAE whatever"/>
</system-properties>
<class-loader-config>
<priority-specifier filename="luceneappengine-2.2.0.jar"/>
</class-loader-config>
</appengine-web-app>