Hi Karl,
With the latest revisions, documents for all jobs (legacy and new) do get
picked up and processed, which is great! This was verified on a small
1-node test system.
I have since applied the fix to a much larger environment (29M docs across
4 MCF agents using a 3-node Zookeeper cluster) which has a bunch of
mid-sized (100,000s docs) jobs in a Running state. The update of the
priorityset field for ~36M jobqueue records took just over an hour. More
problematically for me is the rate of reprioritization on startup which was
very slow - nearly 2 hours to update ~600,000 records.
A couple of SQL queries
(JobManager#getNextNotYetProcessedRepriotizationDocuments and
ManifoldCF#writeDocumentPriorities) come up frequently, but a VisualVM
profile of the MCF agent shows the majority of the Agents thread's time is
spent talking to ZK, for locking + reading some config data very frequently
- see the snapshots below.
Is it possible to avoid the per-document locking pattern seen in this case?
Cheers,
Aeham
++++++++++++++++++++++
2014-11-05 15:39:42
"Agents thread" - Thread t@21
java.lang.Thread.State: WAITING
at java.lang.Object.wait(Native Method)
- waiting on <487ef1bb> (a org.apache.zookeeper.ClientCnxn$Packet)
at java.lang.Object.wait(Object.java:503)
at org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1309)
at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1149)
at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1180)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.readData(ZooKeeperConnection.java:819)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.getSharedConfiguration(ZooKeeperLockManager.java:670)
at
org.apache.manifoldcf.core.interfaces.LockManagerFactory.getBooleanProperty(LockManagerFactory.java:110)
at
org.apache.manifoldcf.crawler.connectors.sharedrive.SharedDriveConnector.setThreadContext(SharedDriveConnector.java:157)
at
org.apache.manifoldcf.core.connectorpool.ConnectorPool$Pool.getConnector(ConnectorPool.java:489)
- locked <3f2843d4> (a
org.apache.manifoldcf.core.connectorpool.ConnectorPool$Pool)
at
org.apache.manifoldcf.core.connectorpool.ConnectorPool.grab(ConnectorPool.java:255)
at
org.apache.manifoldcf.crawler.repositoryconnectorpool.RepositoryConnectorPool.grab(RepositoryConnectorPool.java:86)
at
org.apache.manifoldcf.crawler.system.ManifoldCF.writeDocumentPriorities(ManifoldCF.java:1007)
at
org.apache.manifoldcf.crawler.system.ManifoldCF.resetAllDocumentPriorities(ManifoldCF.java:960)
at
org.apache.manifoldcf.crawler.system.CrawlerAgent.cleanUpAllAgentData(CrawlerAgent.java:155)
at
org.apache.manifoldcf.agents.system.AgentsDaemon$CleanupAgent.cleanUpAllServices(AgentsDaemon.java:356)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.registerServiceBeginServiceActivity(ZooKeeperLockManager.java:203)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.registerServiceBeginServiceActivity(ZooKeeperLockManager.java:129)
at
org.apache.manifoldcf.agents.system.AgentsDaemon.checkAgents(AgentsDaemon.java:270)
- locked <6c7d33b0> (a java.util.HashMap)
at
org.apache.manifoldcf.agents.system.AgentsDaemon$AgentsThread.run(AgentsDaemon.java:208)
Locked ownable synchronizers:
- None
++++++++++++++++++++++
2014-11-05 15:39:52
"Agents thread" - Thread t@21
java.lang.Thread.State: WAITING
at java.lang.Object.wait(Native Method)
- waiting on <52698c72> (a org.apache.zookeeper.ClientCnxn$Packet)
at java.lang.Object.wait(Object.java:503)
at org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1309)
at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:781)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.createSequentialChild(ZooKeeperConnection.java:1116)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.obtainReadLock(ZooKeeperConnection.java:691)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockObject.obtainGlobalReadLock(ZooKeeperLockObject.java:193)
at
org.apache.manifoldcf.core.lockmanager.LockObject.enterReadLock(LockObject.java:310)
- locked <151db932> (a
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockObject)
at
org.apache.manifoldcf.core.lockmanager.LockGate.enterReadLock(LockGate.java:261)
at
org.apache.manifoldcf.core.lockmanager.BaseLockManager.enterRead(BaseLockManager.java:1283)
at
org.apache.manifoldcf.core.lockmanager.BaseLockManager.enterReadLock(BaseLockManager.java:790)
at
org.apache.manifoldcf.crawler.reprioritizationtracker.ReprioritizationTracker.getMinimumDepth(ReprioritizationTracker.java:251)
at
org.apache.manifoldcf.crawler.system.PriorityCalculator.<init>(PriorityCalculator.java:89)
at
org.apache.manifoldcf.crawler.system.ManifoldCF.writeDocumentPriorities(ManifoldCF.java:1021)
at
org.apache.manifoldcf.crawler.system.ManifoldCF.resetAllDocumentPriorities(ManifoldCF.java:960)
at
org.apache.manifoldcf.crawler.system.CrawlerAgent.cleanUpAllAgentData(CrawlerAgent.java:155)
at
org.apache.manifoldcf.agents.system.AgentsDaemon$CleanupAgent.cleanUpAllServices(AgentsDaemon.java:356)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.registerServiceBeginServiceActivity(ZooKeeperLockManager.java:203)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.registerServiceBeginServiceActivity(ZooKeeperLockManager.java:129)
at
org.apache.manifoldcf.agents.system.AgentsDaemon.checkAgents(AgentsDaemon.java:270)
- locked <6c7d33b0> (a java.util.HashMap)
at
org.apache.manifoldcf.agents.system.AgentsDaemon$AgentsThread.run(AgentsDaemon.java:208)
Locked ownable synchronizers:
- None
++++++++++++++++++++++
2014-11-05 15:39:59
"Agents thread" - Thread t@21
java.lang.Thread.State: WAITING
at java.lang.Object.wait(Native Method)
- waiting on <79c64d6d> (a org.apache.zookeeper.ClientCnxn$Packet)
at java.lang.Object.wait(Object.java:503)
at org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1309)
at org.apache.zookeeper.ZooKeeper.delete(ZooKeeper.java:871)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.releaseLock(ZooKeeperConnection.java:796)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockObject.clearLock(ZooKeeperLockObject.java:218)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockObject.clearGlobalReadLockNoWait(ZooKeeperLockObject.java:212)
at
org.apache.manifoldcf.core.lockmanager.LockObject.clearGlobalReadLock(LockObject.java:395)
at
org.apache.manifoldcf.core.lockmanager.LockObject.leaveReadLock(LockObject.java:376)
- locked <126e1776> (a
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockObject)
at
org.apache.manifoldcf.core.lockmanager.LockGate.leaveReadLock(LockGate.java:289)
- locked <126e1776> (a
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockObject)
at
org.apache.manifoldcf.core.lockmanager.BaseLockManager.leaveRead(BaseLockManager.java:1369)
at
org.apache.manifoldcf.core.lockmanager.BaseLockManager.leaveReadLock(BaseLockManager.java:804)
at
org.apache.manifoldcf.crawler.reprioritizationtracker.ReprioritizationTracker.getMinimumDepth(ReprioritizationTracker.java:258)
at
org.apache.manifoldcf.crawler.system.PriorityCalculator.<init>(PriorityCalculator.java:89)
at
org.apache.manifoldcf.crawler.system.ManifoldCF.writeDocumentPriorities(ManifoldCF.java:1021)
at
org.apache.manifoldcf.crawler.system.ManifoldCF.resetAllDocumentPriorities(ManifoldCF.java:960)
at
org.apache.manifoldcf.crawler.system.CrawlerAgent.cleanUpAllAgentData(CrawlerAgent.java:155)
at
org.apache.manifoldcf.agents.system.AgentsDaemon$CleanupAgent.cleanUpAllServices(AgentsDaemon.java:356)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.registerServiceBeginServiceActivity(ZooKeeperLockManager.java:203)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.registerServiceBeginServiceActivity(ZooKeeperLockManager.java:129)
at
org.apache.manifoldcf.agents.system.AgentsDaemon.checkAgents(AgentsDaemon.java:270)
- locked <6c7d33b0> (a java.util.HashMap)
at
org.apache.manifoldcf.agents.system.AgentsDaemon$AgentsThread.run(AgentsDaemon.java:208)
Locked ownable synchronizers:
- None
++++++++++++++++++++++
2014-11-05 15:40:11
"Agents thread" - Thread t@21
java.lang.Thread.State: WAITING
at java.lang.Object.wait(Native Method)
- waiting on <354dbdf> (a org.apache.zookeeper.ClientCnxn$Packet)
at java.lang.Object.wait(Object.java:503)
at org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1309)
at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1149)
at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1180)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.readData(ZooKeeperConnection.java:819)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.getSharedConfiguration(ZooKeeperLockManager.java:670)
at
org.apache.manifoldcf.core.interfaces.LockManagerFactory.getBooleanProperty(LockManagerFactory.java:110)
at
org.apache.manifoldcf.crawler.connectors.sharedrive.SharedDriveConnector.setThreadContext(SharedDriveConnector.java:157)
at
org.apache.manifoldcf.core.connectorpool.ConnectorPool$Pool.getConnector(ConnectorPool.java:489)
- locked <6f2f3168> (a
org.apache.manifoldcf.core.connectorpool.ConnectorPool$Pool)
at
org.apache.manifoldcf.core.connectorpool.ConnectorPool.grab(ConnectorPool.java:255)
at
org.apache.manifoldcf.crawler.repositoryconnectorpool.RepositoryConnectorPool.grab(RepositoryConnectorPool.java:86)
at
org.apache.manifoldcf.crawler.system.ManifoldCF.writeDocumentPriorities(ManifoldCF.java:1007)
at
org.apache.manifoldcf.crawler.system.ManifoldCF.resetAllDocumentPriorities(ManifoldCF.java:960)
at
org.apache.manifoldcf.crawler.system.CrawlerAgent.cleanUpAllAgentData(CrawlerAgent.java:155)
at
org.apache.manifoldcf.agents.system.AgentsDaemon$CleanupAgent.cleanUpAllServices(AgentsDaemon.java:356)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.registerServiceBeginServiceActivity(ZooKeeperLockManager.java:203)
at
org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager.registerServiceBeginServiceActivity(ZooKeeperLockManager.java:129)
at
org.apache.manifoldcf.agents.system.AgentsDaemon.checkAgents(AgentsDaemon.java:270)
- locked <6c7d33b0> (a java.util.HashMap)
at
org.apache.manifoldcf.agents.system.AgentsDaemon$AgentsThread.run(AgentsDaemon.java:208)
Locked ownable synchronizers:
- None
