Details
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Bug
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Status: Resolved
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Major
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Resolution: Fixed
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Manifold 1.7.1
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None
Description
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?
"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)
"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$Packet) at java.lang.Object.wait(Object.java:503) at org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1309) at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:781) at org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.createSequentialChild(ZooKeeperConnection.java:1116) at org.apache.manifoldcf.core.lockmanager.ZooKeeperConnection.obtainReadLock(ZooKeeperConnection.java:691) at org.apache.manifoldcf.core.lockmanager.ZooKeeperLockObject.obtainGlobalReadLock(ZooKeeperLockObject.java:193) at org.apache.manifoldcf.core.lockmanager.LockObject.enterReadLock(LockObject.java:310) - locked <151db932> (a org.apache.manifoldcf.core.lockmanager.ZooKeeperLockObject) at org.apache.manifoldcf.core.lockmanager.LockGate.enterReadLock(LockGate.java:261) at org.apache.manifoldcf.core.lockmanager.BaseLockManager.enterRead(BaseLockManager.java:1283) at org.apache.manifoldcf.core.lockmanager.BaseLockManager.enterReadLock(BaseLockManager.java:790) at org.apache.manifoldcf.crawler.reprioritizationtracker.ReprioritizationTracker.getMinimumDepth(ReprioritizationTracker.java:251) at org.apache.manifoldcf.crawler.system.PriorityCalculator.<init>(PriorityCalculator.java:89) at org.apache.manifoldcf.crawler.system.ManifoldCF.writeDocumentPriorities(ManifoldCF.java:1021) at org.apache.manifoldcf.crawler.system.ManifoldCF.resetAllDocumentPriorities(ManifoldCF.java:960) at org.apache.manifoldcf.crawler.system.CrawlerAgent.cleanUpAllAgentData(CrawlerAgent.java:155)
"Agents thread" - Thread t@21 java.lang.Thread.State: WAITING at java.lang.Object.wait(Native Method) - waiting on <79c64d6d> (a org.apache.zookeeper.ClientCnxn$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$CleanupAgent.cleanUpAllServices(AgentsDaemon.java:356)
"Agents thread" - Thread t@21 java.lang.Thread.State: WAITING at java.lang.Object.wait(Native Method) - waiting on <354dbdf> (a org.apache.zookeeper.ClientCnxn$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