我搜索了很多这个问题，但是我找不到很多关于这个问题的资源。
我们正在2个FreeBsd服务器上运行SolrCloud的设置。每天晚上12点，我们的Solr服务器在某种程度上被solr内部优雅地关闭。奇怪的是，两个solr服务器都在重启。
我没有任何原因，看起来Jetty是设置“stopAtShutdown”和“gracefulShutdown”的可能原因，但我不确定重启solr的原因是什么。
一些日志行：
INFO - 2015-11-24 00:00:01.056; org.eclipse.jetty.server.Server; Graceful shutdown SocketConnector@0.0.0.0:8983
INFO - 2015-11-24 00:00:01.057; org.eclipse.jetty.server.Server; Graceful shutdown o.e.j.w.WebAppContext{/solr,file:/usr/local/share/examples/apache-solr/solr-webapp/webapp/},/usr/local/share/examples/apa
che-solr/webapps/solr.war
INFO - 2015-11-24 00:00:02.064; org.apache.solr.core.CoreContainer; Shutting down CoreContainer instance=568196821
WARN - 2015-11-24 00:00:02.065; org.apache.solr.cloud.RecoveryStrategy; Stopping recovery for core=X_shard1_replica2 coreNodeName=core_node1
WARN - 2015-11-24 00:00:02.065; org.apache.solr.cloud.RecoveryStrategy; Stopping recovery for core=Y_shard1_replica1 coreNodeName=core_node1
INFO - 2015-11-24 00:00:02.065; org.apache.solr.cloud.ZkController; publishing core=Z_shard1_replica1 state=down collection=Z
INFO - 2015-11-24 00:00:02.073; org.apache.solr.cloud.ZkController; publishing core=Zoetermeer_Openbaar_shard1_replica2 state=down collection=Zoetermeer_Openbaar
INFO - 2015-11-24 00:00:02.102; org.apache.solr.cloud.ZkController; publishing core=X_shard1_replica2 state=down collection=X
INFO - 2015-11-24 00:00:02.110; org.apache.solr.cloud.ZkController; publishing core=Y_shard1_replica1 state=down collection=Y
INFO - 2015-11-24 00:00:02.125; org.apache.solr.core.SolrCore; [Z_shard1_replica1] CLOSING SolrCore org.apache.solr.core.SolrCore@3e6f43bd
INFO - 2015-11-24 00:00:02.125; org.apache.solr.update.DirectUpdateHandler2; closing DirectUpdateHandler2{commits=0,autocommits=0,soft autocommits=0,optimizes=0,rollbacks=0,expungeDeletes=0,docsPending=0,
adds=0,deletesById=0,deletesByQuery=0,errors=0,cumulative_adds=0,cumulative_deletesById=0,cumulative_deletesByQuery=0,cumulative_errors=0,transaction_logs_total_size=0,transaction_logs_total_number=0}
INFO - 2015-11-24 00:00:02.126; org.apache.solr.update.SolrCoreState; Closing SolrCoreState
INFO - 2015-11-24 00:00:02.126; org.apache.solr.update.DefaultSolrCoreState; SolrCoreState ref count has reached 0 - closing IndexWriter
INFO - 2015-11-24 00:00:02.126; org.apache.solr.update.DefaultSolrCoreState; closing IndexWriter with IndexWriterCloser
INFO - 2015-11-24 00:00:02.129; org.apache.solr.core.SolrCore; [Z_shard1_replica1] Closing main searcher on request.
INFO - 2015-11-24 00:00:02.130; org.apache.solr.core.CachingDirectoryFactory; Closing StandardDirectoryFactory - 2 directories currently being tracked
INFO - 2015-11-24 00:00:02.132; org.apache.solr.common.cloud.ZkStateReader$2; A cluster state change: WatchedEvent state:SyncConnected type:NodeDataChanged path:/clusterstate.json, has occurred - updating
... (live nodes size: 2)
INFO - 2015-11-24 00:00:02.133; org.apache.solr.core.CachingDirectoryFactory; looking to close /data/solr/Z_shard1_replica1/data/index [CachedDir<<refCount=0;path=/data/solr/Z_shard1_replica1/data/index;done=false>>]
INFO - 2015-11-24 00:00:02.133; org.apache.solr.core.CachingDirectoryFactory; Closing directory: /data/solr/Z_shard1_replica1/data/index
INFO - 2015-11-24 00:00:02.134; org.apache.solr.core.CachingDirectoryFactory; looking to close /data/solr/Z_shard1_replica1/data [CachedDir<<refCount=0;path=/data/solr/Z_shard1_replica1/data;done=false>>]
INFO - 2015-11-24 00:00:02.134; org.apache.solr.core.CachingDirectoryFactory; Closing directory: /data/solr/Z_shard1_replica1/data
INFO - 2015-11-24 00:00:02.134; org.apache.solr.core.SolrCore; [X_Openbaar_shard1_replica2] CLOSING SolrCore org.apache.solr.core.SolrCore@78
有人知道发生了什么事吗？