Getting solr exception after migrating from 6.2 to 6.4

[Former Member]

We migrated from 6.2 to 6.4 and now during intialization phase we get the following exception.

Solr cloud config

 solrserver.instances.default.autostart=false
 solrserver.instances.default.mode=cloud
 solrserver.instances.default.zk.host=*****:****,*******:****

 [java] ERROR [main] [BackofficeSolrSearchStartupHandler] Backoffice solr index purge failed for type Product     [java] de.hybris.platform.solrfacetsearch.solr.exceptions.SolrServiceException: A Solr Server mode of: CLOUD is not supported. Please specify standalone in the solr configuration.     [java]             at de.hybris.platform.solrfacetsearch.solr.impl.SolrServiceImpl.getSolrServiceImpl(SolrServiceImpl.java:173) ~[solrfacetsearchserver.jar:?]     [java]             at de.hybris.platform.solrfacetsearch.solr.impl.SolrServiceImpl.deleteIndex(SolrServiceImpl.java:118) ~[solrfacetsearchserver.jar:?]     [java]             at com.hybris.backoffice.solrsearch.setup.BackofficeSolrSearchStartupHandler.lambda$1(BackofficeSolrSearchStartupHandler.java:92) ~[backofficesolrsearchserver.jar:?]     [java]             at com.hybris.backoffice.events.AbstractBackofficeEventListener.onEvent(AbstractBackofficeEventListener.java:56) [backofficeserver.jar:?]     [java]             at de.hybris.platform.servicelayer.event.impl.AbstractEventListener.onApplicationEvent(AbstractEventListener.java:65) [coreserver.jar:?]     [java]             at de.hybris.platform.servicelayer.event.impl.AbstractEventListener.onApplicationEvent(AbstractEventListener.java:1) [coreserver.jar:?]     [java]             at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) [spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]     [java]             at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) [spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]     [java]             at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) [spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]     [java]             at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:393) [spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]     [java]             at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:347) [spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]     [java]             at de.hybris.platform.spring.ctx.CloseAwareApplicationContext.publishEvent(CloseAwareApplicationContext.java:107) [coreserver.jar:?]     [java]             at de.hybris.platform.servicelayer.event.impl.SpringEventSender.sendEvent(SpringEventSender.java:33) [coreserver.jar:?]     [java]             at de.hybris.platform.servicelayer.event.impl.PlatformClusterEventSender.sendEvent(PlatformClusterEventSender.java:60) [coreserver.jar:?]     [java]             at de.hybris.platform.servicelayer.event.impl.DefaultEventService.publishEvent(DefaultEventService.java:75) [coreserver.jar:?]     [java]             at de.hybris.platform.servicelayer.internal.jalo.ServicelayerManager.notifyInitializationStart(ServicelayerManager.java:298) [coreserver.jar:?]     [java]             at de.hybris.platform.core.Initialization.doInitializeImpl(Initialization.java:506) [coreserver.jar:?]     [java]             at de.hybris.platform.core.Initialization.access$5(Initialization.java:465) [coreserver.jar:?]     [java]             at de.hybris.platform.core.Initialization$5.call(Initialization.java:786) [coreserver.jar:?]     [java]             at de.hybris.platform.core.Initialization$5.call(Initialization.java:1) [coreserver.jar:?]     [java]             at de.hybris.platform.core.system.InitializationLockHandler.performLocked(InitializationLockHandler.java:80) [coreserver.jar:?]     [java]             at de.hybris.platform.core.Initialization.doInitialize(Initialization.java:818) [coreserver.jar:?]     [java]             at de.hybris.ant.taskdefs.InitPlatformAntPerformableImpl.performImpl(InitPlatformAntPerformableImpl.java:106) [coreserver.jar:?]     [java]             at de.hybris.ant.taskdefs.AbstractAntPerformable.doPerform(AbstractAntPerformable.java:92) [coreserver.jar:?]     [java]             at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_151]     [java]             at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_151]     [java]             at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_151]     [java]             at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_151]     [java]             at bsh.Reflect.invokeMethod(Reflect.java:134) [bsh-2.0b5.jar:2.0b5 2005-06-12 04:50:41]     [java]             at bsh.Reflect.invokeObjectMethod(Reflect.java:80) [bsh-2.0b5.jar:2.0b5 2005-06-12 04:50:41]     [java]             at bsh.Name.invokeMethod(Name.java:858) [bsh-2.0b5.jar:2.0b5 2005-06-12 04:50:41]     [java]             at bsh.BSHMethodInvocation.eval(BSHMethodInvocation.java:75) [bsh-2.0b5.jar:2.0b5 2005-06-12 04:50:41]     [java]             at bsh.BSHPrimaryExpression.eval(BSHPrimaryExpression.java:102) [bsh-2.0b5.jar:2.0b5 2005-06-12 04:50:41]     [java]             at bsh.BSHPrimaryExpression.eval(BSHPrimaryExpression.java:47) [bsh-2.0b5.jar:2.0b5 2005-06-12 04:50:41]     [java]             at bsh.Interpreter.eval(Interpreter.java:645) [bsh-2.0b5.jar:2.0b5 2005-06-12 04:50:41]     [java]             at bsh.Interpreter.eval(Interpreter.java:739) [bsh-2.0b5.jar:2.0b5 2005-06-12 04:50:41]     [java]             at bsh.Interpreter.eval(Interpreter.java:728) [bsh-2.0b5.jar:2.0b5 2005-06-12 04:50:41]     [java]             at de.hybris.platform.util.ClientExecuter.execute(ClientExecuter.java:49) [coreserver.jar:?]     [java]             at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_151]     [java]             at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_151]     [java]             at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_151]     [java]             at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_151]     [java]             at de.hybris.bootstrap.loader.Loader.execute(Loader.java:142) [ybootstrap.jar:?]     [java]             at de.hybris.bootstrap.loader.Loader.main(Loader.java:118) [ybootstrap.jar:?]     [java] INFO  [main] [DefaultTaskService] Shutting down task engine for tenant master.     [java] INFO  [main] [DefaultTaskService] Terminating task polling thread.     [java] INFO  [main] [DefaultTaskService] Stopped task engine for tenant master.     [java] INFO  [main] [Initialization] ###############################################################     [java] INFO  [main] [Initialization] Initialize system ...     [java] INFO  [main] [Initialization] ###############################################################