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https://issues.apache.org/jira/browse/SOLR-7055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14295630#comment-14295630
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Mark Miller commented on SOLR-7055:
-----------------------------------
Yeah, I think we could offer an upgrade script option, but since these are
temporary responses for collection api call responses, I think it's probably
okay to toss them as part of the upgrade for most people - if we can't read
them, continue on. We would just want to upgrade note a recommendation to not
run collections api commands while doing the rolling upgrade (they should still
work the same, but you might get an exception rather than a proper response).
> Java serialization error while operating a mixed mode Solr cluster
> ------------------------------------------------------------------
>
> Key: SOLR-7055
> URL: https://issues.apache.org/jira/browse/SOLR-7055
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 4.10.3
> Reporter: Hrishikesh Gadre
>
> We are in the process of upgrading Solr cloud from 4.4.0 to 4.10.3. We setup
> a mixed mode cluster having 1 node of version 4.10.3 and multiple nodes of
> version 4.4.0. The overseer node was on the older version.
> When we submitted the request to create a collection, it failed with
> following exception,
> 2015-01-27 16:37:46,366 INFO org.apache.solr.servlet.SolrDispatchFilter:
> [admin] webapp=null path=/admin/collections params=
> {numShards=2&maxShardsPerNode=5&createNodeSet=search-testing-c5-ha-2.vpc.cloudera.com&name=coll_ctl_basic_test&replicationFactor=2&action=CREATE}
> status=500 QTime=23
> 2015-01-27 16:37:46,366 ERROR org.apache.solr.servlet.SolrDispatchFilter:
> null:org.apache.solr.common.SolrException: java.io.InvalidClassException:
> org.apache.solr.common.SolrException; local class incompatible: stream
> classdesc serialVersionUID = -3117666575281450216, local class
> serialVersionUID = 7729548960805930390
> at org.apache.solr.client.solrj.SolrResponse.deserialize(SolrResponse.java:60)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:359)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:320)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleCreateAction(CollectionsHandler.java:486)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleRequestBody(CollectionsHandler.java:148)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
> at
> org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:770)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:271)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:211)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> ...
> Caused by: java.io.InvalidClassException:
> org.apache.solr.common.SolrException; local class incompatible: stream
> classdesc serialVersionUID = -3117666575281450216, local class
> serialVersionUID = 7729548960805930390
> at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:617)
> at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1622)
> at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
> at java.util.ArrayList.readObject(ArrayList.java:771)
> at sun.reflect.GeneratedMethodAccessor426.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
> at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
> at org.apache.solr.client.solrj.SolrResponse.deserialize(SolrResponse.java:58)
> ... 30 more
> From the upgrade perspective, it is important to ensure backward
> compatibility between the request/response data-types used by Solr cloud.
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