[SOLR-7271] 4.4 client to 4.5+ server compatibility Issue due to DocRouter format

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 4.5
• Fix Version/s: 4.10.5
• Component/s: SolrCloud
• Assignee: Gregory Chanan
• Reporter: Gregory Chanan
• Created: 19/Mar/15 01:58
• Updated: 30/Mar/15 20:21
• Resolved: 30/Mar/15 20:21

Description

SOLR-4221 changed the router format from e.g.:

...
"router":"compositeId”,
...

to:

...
"router":{"name":"compositeId"},
...

This later commit: https://github.com/apache/lucene-solr/commit/54a94eedfd5651bb088e8cbd132393b771f5f5c2 added backwards compatibility in the sense that the server can read the old router format. But the old 4.4 client can't read the new format, e.g. you get:

org.apache.solr.common.SolrException: Unknown document router '{name=compositeId}'
	at org.apache.solr.common.cloud.DocRouter.getDocRouter(DocRouter.java:46)
	at org.apache.solr.common.cloud.ClusterState.collectionFromObjects(ClusterState.java:289)
	at org.apache.solr.common.cloud.ClusterState.load(ClusterState.java:257)
	at org.apache.solr.common.cloud.ClusterState.load(ClusterState.java:233)
	at org.apache.solr.common.cloud.ZkStateReader.createClusterStateWatchersAndUpdate(ZkStateReader.java:357)
	at com.cloudera.itest.search.util.ZkExecutor.<init>(ZkExecutor.java:39)
	at com.cloudera.itest.search.util.SearchTestBase.getZkExecutor(SearchTestBase.java:648)
	at com.cloudera.itest.search.util.SearchTestBase.setupSolrURL(SearchTestBase.java:584)
	at com.cloudera.itest.search.util.SearchTestBase.setupEnvironment(SearchTestBase.java:371)
	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:606)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)