Alexey Serba created SOLR-7459:
----------------------------------

             Summary: Collections API LIST command times out sporadically
                 Key: SOLR-7459
                 URL: https://issues.apache.org/jira/browse/SOLR-7459
             Project: Solr
          Issue Type: Bug
          Components: SolrCloud
    Affects Versions: 5.0, 4.10.4
            Reporter: Alexey Serba


I see {{/collections?action=LIST}} command times out and fails sporadically 
with 

{noformat:title="exception"}
15:48:32.433 [qtp1897554826-942] ERROR 
org.apache.solr.servlet.SolrDispatchFilter - 
null:org.apache.solr.common.SolrException: LIST the collection time out:180s
        at 
org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:630)
        at 
org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:582)
        at 
org.apache.solr.handler.admin.CollectionsHandler.handleListAction(CollectionsHandler.java:947)
        at 
org.apache.solr.handler.admin.CollectionsHandler.handleRequestBody(CollectionsHandler.java:252)
        at 
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:144)
        at 
org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:736)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:261)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:204)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at org.eclipse.jetty.server.Server.handle(Server.java:497)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
        at 
org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
        at java.lang.Thread.run(Thread.java:745)
{noformat}

Just listing collection names shouldn't take that long, no?



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