解決辦法有3
1是在managed schema置meta_* 的index=false
2是在managed schema置meta_* 的type=任意一種class是solr.TextField的型別
3是修改nutch程式碼MetaTagsParser.java如下

  private void addIndexedMetatags(Map<CharSequence, ByteBuffer> metadata,
      String metatag, String value) {
      //add here
      if(value.getBytes("utf-8"
 
).length > 32765) return;
    String lcMetatag = metatag.toLowerCase(Locale.ROOT);
    if (metatagset.contains("*") || metatagset.contains(lcMetatag)) {
      if (LOG.isDebugEnabled()) {
        LOG.debug("Found meta tag: " + lcMetatag + "\t" + value);
      }
      metadata.put(new Utf8(PARSE_META_PREFIX + lcMetatag),
          ByteBuffer.wrap(value
 
.getBytes()));
    }
  }

3 如果資料庫已經存在過長資料，需要在index時過濾，修改檔案: SolrIndexWriter.java

@Override
  public void write(NutchDocument doc) throws IOException {
    final SolrInputDocument inputDoc = new SolrInputDocument();
    for (final Entry<String, List<String>> e : doc) {
      for (final String val : e.getValue
 
()) {

        Object val2 = val;
        if (e.getKey().equals("content") || e.getKey().equals("title")) {
          val2 = SolrUtils.stripNonCharCodepoints(val);
        }
        if(e.getKey().startsWith("meta_") && val.getBytes("utf-8").length > 32765){
            LOG.warn("trim too long value for key:" + e.getKey());
            continue;
        }
        inputDoc.addField(solrMapping.mapKey(e.getKey()), val2);
        String sCopy = solrMapping.mapCopyKey(e.getKey());
        if (sCopy != e.getKey()) {
          inputDoc.addField(sCopy, val2);
        }
      }
    }
    inputDoc.setDocumentBoost(doc.getScore());
    inputDocs.add(inputDoc);
    documentCount++;
    if (inputDocs.size() >= batchSize) {
      try {
        LOG.info("Adding " + Integer.toString(inputDocs.size()) + " documents");
        solr.add(inputDocs);
      } catch (final SolrServerException e) {
        throw new IOException(e);
      }
      inputDocs.clear();
    }
  }