Question

I’m trying to get clojure-solr-0.2.0 working with solr4 (trunk nightly build). I’m getting the following exception:

Caused by: java.lang.RuntimeException: Invalid version or the data in not in 'javabin' format
at org.apache.solr.common.util.JavaBinCodec.unmarshal(JavaBinCodec.java:99)
at org.apache.solr.client.solrj.impl.BinaryResponseParser.processResponse(BinaryResponseParser.java:39)
at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:466)
at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:243)
at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:89)

I’m assuming this is because clojure-solr is using some version of solrj library that is from solr3 codebase and javabin format changed between versions.

Is there some easy way to get this to work?

EDIT:

I deleted solrj from my project’s lib folder, and replaced it with lib/apache-solr-solrj-4.0-2012-05-15_08-20-37.jar. I was hoping that would just work since the same classes (should) be found on the classpath at runtime (the transitive dependency should only be required when lein deps is run to fetch dependencies (or so I reasoned). The result was a class not found at runtime:

Caused by: java.lang.ClassNotFoundException:    org.apache.solr.client.solrj.impl.CommonsHttpSolrServer
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at clojure.lang.DynamicClassLoader.findClass(DynamicClassLoader.java:61)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at clojure_solr$eval1423$loading__4414__auto____1424.invoke(clojure_solr.clj:1)
at clojure_solr$eval1423.invoke(clojure_solr.clj:1)
at clojure.lang.Compiler.eval(Compiler.java:5424)
... 95 more

And the problem is that CommonsHttpSolrServer is no longer present in the jar:

$ jar tf lib/apache-solr-solrj-4.0-2012-05-15_08-20-37.jar |grep Http
org/apache/solr/client/solrj/impl/HttpSolrServer$1.class
org/apache/solr/client/solrj/impl/HttpSolrServer$2.class
org/apache/solr/client/solrj/impl/HttpSolrServer$3.class
org/apache/solr/client/solrj/impl/HttpSolrServer$DeflateDecompressingEntity.class
org/apache/solr/client/solrj/impl/HttpSolrServer$GzipDecompressingEntity.class
org/apache/solr/client/solrj/impl/HttpSolrServer$UseCompressionRequestInterceptor.class
org/apache/solr/client/solrj/impl/HttpSolrServer$UseCompressionResponseInterceptor.class
org/apache/solr/client/solrj/impl/HttpSolrServer.class
org/apache/solr/client/solrj/impl/LBHttpSolrServer$1.class
org/apache/solr/client/solrj/impl/LBHttpSolrServer$Req.class
org/apache/solr/client/solrj/impl/LBHttpSolrServer$Rsp.class
org/apache/solr/client/solrj/impl/LBHttpSolrServer$ServerWrapper.class
org/apache/solr/client/solrj/impl/LBHttpSolrServer.class
$ jar tf lib/apache-solr-solrj-4.0-2012-05-15_08-20-37.jar |grep CommonsHttp
$

Answer 1

you will very likely need to make your own build of clojure-solr and fix it to work with the latest solr4. This is actually not that hard.

• clone it from the github project
• lein install
• add it as a dependency in your main project
• hack and repeat.