1、报错1 org.apache.solr.common.SolrException: Collection not found
org.apache.solr.common.SolrException: Collection not found: dem6
at org.apache.solr.client.solrj.impl.CloudSolrServer.getCollectionList(CloudSolrServer.java:655)
at org.apache.solr.client.solrj.impl.CloudSolrServer.request(CloudSolrServer.java:539)
at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:91)
at org.apache.solr.client.solrj.SolrServer.query(SolrServer.java:301)
at com.xc.os.sys.entity.Test.main(Test.java:23)
我solr集群的版本是6.0.0
我后台solrj的版本是4.7.2，maven中配的是lucene 4.6.0
solrj 4.7.2 对应的后台代码如下：
public static void main(String[] args) {
try {
String zkHost = "192.168.1.21:2181,192.168.1.21:2182,192.168.1.21:2183";
CloudSolrServer server = new CloudSolrServer(zkHost);
server.setDefaultCollection("dem6");
server.connect();
SolrQuery solrQuery = new SolrQuery();
solrQuery.setQuery("*:*");
QueryResponse queryResponse = server.query(solrQuery);
SolrDocumentList solrDocumentList = queryResponse.getResults();
System.out.println("数量：" + solrDocumentList.getNumFound());
for (SolrDocument solrDocument : solrDocumentList) {
System.out.println(solrDocument.get("content"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
2、报错1处理方法
2.1 pom.xml修改，将solr的版本由4.6.0改为6.0.0
去掉<lucene.version>4.6.0</lucene.version>
添加
<dependency>
<groupId>org.apache.solr</groupId>
<artifactId>solr-solrj</artifactId>
<version>6.0.0</version>
</dependency>
修改后，maven重新更新一个引用
2.2 修改后台代码
public static void main(String[] args) {
try {
String zkHost = "192.168.1.21:2181,192.168.1.21:2182,192.168.1.21:2183";
CloudSolrClient client = new CloudSolrClient(zkHost);
client.setZkClientTimeout(30000);
client.setZkConnectTimeout(50000);
client.setDefaultCollection("dem6");
client.connect();
SolrQuery solrQuery = new SolrQuery();
solrQuery.setQuery("*:*");
QueryResponse queryResponse = client.query(solrQuery);
SolrDocumentList solrDocumentList = queryResponse.getResults();
System.out.println("数量：" + solrDocumentList.getNumFound());
for (SolrDocument solrDocument : solrDocumentList) {
System.out.println(solrDocument.get("content"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
运行结果如图：
与solr页面中查到的数量进行对比
3、报错2 No live SolrServers available to handle this request
2020-02-23 18:51:40.459 ERROR o.a.s.c.solrj.impl.CloudSolrClient - Request to collection dem6 failed due to (404) org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error from server at http://192.168.1.21:8280/solr/dem6: Expected mime type application/octet-stream but got text/html. <!doctype html><html lang="en"><head><title>HTTP Status 404 – Not Found</title><style type="text/css">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP Status 404 – Not Found</h1><hr class="line" /><p><b>Type</b> Status Report</p><p><b>Message</b> /solr/dem6/question_select</p><p><b>Description</b> The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.</p><hr class="line" /><h3>Apache Tomcat/8.5.50</h3></body></html>, retry? 0
org.apache.solr.client.solrj.SolrServerException: No live SolrServers available to handle this request:[http://192.168.1.21:8180/solr/dem6, http://192.168.1.21:8380/solr/dem6, http://192.168.1.21:8480/solr/dem6, http://192.168.1.21:8280/solr/dem6]
at org.apache.solr.client.solrj.impl.LBHttpSolrClient.request(LBHttpSolrClient.java:352)
at org.apache.solr.client.solrj.impl.CloudSolrClient.sendRequest(CloudSolrClient.java:1100)
at org.apache.solr.client.solrj.impl.CloudSolrClient.requestWithRetryOnStaleState(CloudSolrClient.java:870)
at org.apache.solr.client.solrj.impl.CloudSolrClient.request(CloudSolrClient.java:806)
at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:149)
at org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:942)
at org.apache.solr.client.solrj.SolrClient.query(SolrClient.java:957)
at com.xc.os.sys.entity.Test.main(Test.java:30)
Caused by: org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error from server at http://192.168.1.21:8280/solr/dem6: Expected mime type application/octet-stream but got text/html. <!doctype html><html lang="en"><head><title>HTTP Status 404 – Not Found</title><style type="text/css">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP Status 404 – Not Found</h1><hr class="line" /><p><b>Type</b> Status Report</p><p><b>Message</b> /solr/dem6/question_select</p><p><b>Description</b> The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.</p><hr class="line" /><h3>Apache Tomcat/8.5.50</h3></body></html>
at org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:545)
at org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:241)
at org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:230)
at org.apache.solr.client.solrj.impl.LBHttpSolrClient.doRequest(LBHttpSolrClient.java:372)
at org.apache.solr.client.solrj.impl.LBHttpSolrClient.request(LBHttpSolrClient.java:325)
4、报错2处理方法
public static void main(String[] args) {
try {
String zkHost = "192.168.1.21:2181,192.168.1.21:2182,192.168.1.21:2183";
CloudSolrClient client = new CloudSolrClient(zkHost);
client.setDefaultCollection("dem6");
client.connect();
SolrQuery solrQuery = new SolrQuery();
//solrQuery.setRows(Integer.MAX_VALUE);
solrQuery.setRows(500);
solrQuery.set("qt", "/question_select");
//solrQuery.setQuery("*:*");
//solrQuery.set("qt", "/select");
QueryResponse queryResponse = client.query(solrQuery);
SolrDocumentList solrDocumentList = queryResponse.getResults();
System.out.println("数量：" + solrDocumentList.getNumFound());
for (SolrDocument solrDocument : solrDocumentList) {
System.out.println(solrDocument.get("content"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
4.1 如上图 修改solrQuery.set(“qt”, “/question_select”);
为
solrQuery.setQuery("*:*");
或者核心对solr的配制文件solrconfig.xml中有没有question_select，没有的话改为有的，如 下图
solrQuery.set("qt", "/question");
4.2 solrQuery.setRows(Integer.MAX_VALUE);也会引发报错2
可以设置rows为根据你自已的业务量设置一个合适的数量，我测过20000，是可以的
solrQuery.setRows(20000);
5、小结
3.1 solr使用时，solr的版本要与solrj的版本保持一致。
3.2 solrj各版本之间的差别比较大，solrj4核心类是CloudSolrServer,solrj6核心类是CloudSolrClient。
