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ASF subversion and git services commented on SOLR-5577: ------------------------------------------------------- Commit 1557160 from [~markrmil...@gmail.com] in branch 'dev/branches/lucene_solr_4_6' [ https://svn.apache.org/r1557160 ] SOLR-5577: don't start timer thread on expiration > indexing delay due to zookeeper election > ---------------------------------------- > > Key: SOLR-5577 > URL: https://issues.apache.org/jira/browse/SOLR-5577 > Project: Solr > Issue Type: Bug > Components: SolrCloud > Reporter: Christine Poerschke > Assignee: Mark Miller > Fix For: 5.0, 4.7, 4.6.1 > > Attachments: SOLR-5577.patch > > > The behaviour we observed was that a zookeeper election took about 2s plus > 1.5s for reading the zoo_data snapshot. During this time solr tried to > establish connections to any zookeeper in the ensemble but only succeeded > once a leader was elected *and* that leader was done reading the snapshot. > Solr document updates were slowed down during this time window. > Is this expected to happen during and shortly after elections, that is > zookeeper closing existing connections, rejecting new connections and thus > stalling solr updates? > Other than avoiding zookeeper elections, are there ways of reducing their > impact on solr? > +zookeeper log extract+ > {noformat} > 08:18:54,968 [QuorumCnxManager.java:762] Connection broken for id ... > 08:18:56,916 [Leader.java:345] LEADING - LEADER ELECTION TOOK - 1941 > 08:18:56,918 [FileSnap.java:83] Reading snapshot ... > ... > 08:18:57,010 [NIOServerCnxnFactory.java:197] Accepted socket connection from > ... > 08:18:57,010 [NIOServerCnxn.java:354] Exception causing close of session 0x0 > due to java.io.IOException: ZooKeeperServer not running > 08:18:57,010 [NIOServerCnxn.java:1001] Closed socket connection for client > ... (no session established for client) > ... > 08:18:58,496 [FileTxnSnapLog.java:240] Snapshotting: ... to ... > {noformat} > +solr log extract+ > {noformat} > 08:18:54,968 [ClientCnxn.java:1085] Unable to read additional data from > server sessionid ... likely server has closed socket, closing socket > connection and attempting reconnect > 08:18:55,068 [ConnectionManager.java:72] Watcher > org.apache.solr.common.cloud.ConnectionManager@... name:ZooKeeperConnection > Watcher:host1:port1,host2:port2,host3:port3,... got event WatchedEvent > state:Disconnected type:None path:null path:null type:None > 08:18:55,068 [ConnectionManager.java:132] zkClient has disconnected > ... > 08:18:55,961 [ClientCnxn.java:966] Opening socket connection to server ... > 08:18:55,961 [ClientCnxn.java:849] Socket connection established to ... > 08:18:55,962 [ClientCnxn.java:1085] Unable to read additional data from > server sessionid ... likely server has closed socket, closing socket > connection and attempting reconnect > ... > 08:18:56,714 [ClientCnxn.java:966] Opening socket connection to server ... > 08:18:56,715 [ClientCnxn.java:849] Socket connection established to ... > 08:18:56,715 [ClientCnxn.java:1085] Unable to read additional data from ... > ... > 08:18:57,640 [ClientCnxn.java:966] Opening socket connection to server ... > 08:18:57,641 [ClientCnxn.java:849] Socket connection established to ... > 08:18:57,641 [ClientCnxn.java:1085] Unable to read additional data from ... > ... > 08:18:58,352 [ClientCnxn.java:966] Opening socket connection to server ... > 08:18:58,353 [ClientCnxn.java:849] Socket connection established to ... > 08:18:58,353 [ClientCnxn.java:1085] Unable to read additional data from ... > ... > 08:18:58,749 [ClientCnxn.java:966] Opening socket connection to server ... > 08:18:58,749 [ClientCnxn.java:849] Socket connection established to ... > 08:18:58,751 [ClientCnxn.java:1207] Session establishment complete on server > ... sessionid = ..., negotiated timeout = ... > 08:18:58,751 ... [ConnectionManager.java:72] Watcher > org.apache.solr.common.cloud.ConnectionManager@... name:ZooKeeperConnection > Watcher:host1:port1,host2:port2,host3:port3,... got event WatchedEvent > state:SyncConnected type:None path:null path:null type:None > {noformat} -- This message was sent by Atlassian JIRA (v6.1.5#6160) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org