solr遇到的cpu使用率过高问题。

"pool-13-thread-1" prio=10 tid=0x00000000444e0000 nid=0x38d9 runnable [0x000000004293c000]
   java.lang.Thread.State: RUNNABLE
        at org.apache.lucene.util.UnicodeUtil.UTF8toUTF16(UnicodeUtil.java:541)
        at org.apache.lucene.index.TermBuffer.read(TermBuffer.java:83)
        at org.apache.lucene.index.SegmentTermEnum.next(SegmentTermEnum.java:133)
        at org.apache.lucene.index.SegmentTermEnum.scanTo(SegmentTermEnum.java:174)
        at org.apache.lucene.index.TermInfosReader.get(TermInfosReader.java:202)
        at org.apache.lucene.index.TermInfosReader.get(TermInfosReader.java:172)
        at org.apache.lucene.index.SegmentTermDocs.seek(SegmentTermDocs.java:66)
        at org.apache.lucene.search.MultiTermQueryWrapperFilter.getDocIdSet(MultiTermQueryWrapperFilter.java:125)
        at org.apache.lucene.search.ConstantScoreQuery$ConstantWeight.scorer(ConstantScoreQuery.java:139)
        at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:577)
        at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:364)
        at org.apache.solr.search.SolrIndexSearcher.getDocSetNC(SolrIndexSearcher.java:863)
        at org.apache.solr.search.SolrIndexSearcher.getDocSet(SolrIndexSearcher.java:617)
        at org.apache.solr.search.SolrIndexSearcher.cacheDocSet(SolrIndexSearcher.java:581)
        at org.apache.solr.search.SolrIndexSearcher$2.regenerateItem(SolrIndexSearcher.java:330)
        at org.apache.solr.search.LRUCache.warm(LRUCache.java:195)
        at org.apache.solr.search.SolrIndexSearcher.warm(SolrIndexSearcher.java:1815)
        at org.apache.solr.core.SolrCore$2.call(SolrCore.java:1166)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)

org.apache.lucene.search.MultiTermQueryWrapperFilter.getDocIdSet(MultiTermQueryWrapperFilter.java:136):

@Override
  public DocIdSet getDocIdSet(IndexReader reader) throws IOException {
    final TermEnum enumerator = query.getEnum(reader);
    try {
      // if current term in enum is null, the enum is empty -> shortcut
      if (enumerator.term() == null)
        return DocIdSet.EMPTY_DOCIDSET;
      // else fill into a FixedBitSet
      final FixedBitSet bitSet = new FixedBitSet(reader.maxDoc());
      final int[] docs = new int[32];
      final int[] freqs = new int[32];
      TermDocs termDocs = reader.termDocs();
      try {
        int termCount = 0;
        do {
          Term term = enumerator.term();
          if (term == null)
            break;
          termCount++;
          termDocs.seek(term);
          while (true) {
            final int count = termDocs.read(docs, freqs);
            if (count != 0) {
              for(int i=0;i<count;i++) {
                bitSet.set(docs[i]);
              }
            } else {
              break;
            }
          }
        } while (enumerator.next());                            //L136

        query.incTotalNumberOfTerms(termCount);

      } finally {
        termDocs.close();
      }
      return bitSet;
    } finally {
      enumerator.close();
    }
  }

org.apache.lucene.search.IndexSearcher.search()的执行时间:

Search .execute time is:720ms
Search .execute time is:758ms
Search .execute time is:758ms
Search .execute time is:3ms
Search .execute time is:4ms
Search .execute time is:804ms
Search .execute time is:804ms
Search .execute time is:863ms
Search .execute time is:863ms
Search .execute time is:816ms
Search .execute time is:816ms
Search .execute time is:923ms
Search .execute time is:923ms
Search .execute time is:829ms
Search .execute time is:829ms
Search .execute time is:929ms
Search .execute time is:929ms
Search .execute time is:1000ms
Search .execute time is:1000ms
Search .execute time is:1ms
Search .execute time is:1ms
Search .execute time is:796ms
Search .execute time is:796ms
Search .execute time is:728ms
Search .execute time is:728ms
Search .execute time is:750ms
Search .execute time is:750ms
Search .execute time is:6ms
Search .execute time is:6ms
Search .execute time is:745ms
Search .execute time is:745ms