Hi, I got the same error on orientdb 2.0.1 with rexster 2.6.0, it happend when I run 2 processes one inserts and the other retrieves.
[ERROR] GremlinExtension - Gremlin Extension: Error on retrieving record #9:298880 (cluster: v) com.orientechnologies.orient.core.exception.ODatabaseException: Error on retrieving record #9:298880 (cluster: v) at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.executeReadRecord(ODatabaseDocumentTx.java:1602) at com.orientechnologies.orient.core.tx.OTransactionOptimistic.loadRecord(OTransactionOptimistic.java:226) at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.load(ODatabaseDocumentTx.java:1421) at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.load(ODatabaseDocumentTx.java:117) at com.orientechnologies.orient.core.id.ORecordId.getRecord(ORecordId.java:313) at com.tinkerpop.blueprints.impls.orient.OrientEdgeIterator.createWrapper(OrientEdgeIterator.java:61) at com.tinkerpop.blueprints.impls.orient.OrientEdgeIterator.createWrapper(OrientEdgeIterator.java:39) at com.orientechnologies.orient.core.iterator.OLazyWrapperIterator.hasNext(OLazyWrapperIterator.java:79) at com.orientechnologies.common.collection.OMultiCollectionIterator.hasNext(OMultiCollectionIterator.java:78) at com.tinkerpop.blueprints.util.DefaultVertexQuery$DefaultVertexQueryIterable$1.loadNext(DefaultVertexQuery.java:163) at com.tinkerpop.blueprints.util.DefaultVertexQuery$DefaultVertexQueryIterable$1.hasNext(DefaultVertexQuery.java:123) at com.tinkerpop.pipes.transform.VertexQueryPipe.processNextStart(VertexQueryPipe.java:79) at com.tinkerpop.pipes.transform.VertexQueryPipe.processNextStart(VertexQueryPipe.java:19) at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89) at com.tinkerpop.pipes.transform.VertexQueryPipe.processNextStart(VertexQueryPipe.java:85) at com.tinkerpop.pipes.transform.VertexQueryPipe.processNextStart(VertexQueryPipe.java:19) at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89) at com.tinkerpop.pipes.transform.VertexQueryPipe.processNextStart(VertexQueryPipe.java:85) at com.tinkerpop.pipes.transform.VertexQueryPipe.processNextStart(VertexQueryPipe.java:19) at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89) at com.tinkerpop.pipes.filter.CollectionFilterPipe.processNextStart(CollectionFilterPipe.java:35) at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89) at com.tinkerpop.pipes.filter.CollectionFilterPipe.processNextStart(CollectionFilterPipe.java:35) at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89) at com.tinkerpop.pipes.filter.DuplicateFilterPipe.processNextStart(DuplicateFilterPipe.java:34) at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89) at com.tinkerpop.pipes.util.AsPipe.processNextStart(AsPipe.java:42) at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89) at com.tinkerpop.pipes.transform.SelectPipe.processNextStart(SelectPipe.java:54) at com.tinkerpop.pipes.transform.SelectPipe.processNextStart(SelectPipe.java:21) at com.tinkerpop.pipes.AbstractPipe.hasNext(AbstractPipe.java:98) at com.tinkerpop.pipes.util.Pipeline.hasNext(Pipeline.java:105) at com.tinkerpop.rexster.gremlin.converter.JSONResultConverter.convert(JSONResultConverter.java:65) at com.tinkerpop.rexster.gremlin.converter.JSONResultConverter.convert(JSONResultConverter.java:40) at com.tinkerpop.rexster.gremlin.converter.JSONResultConverter.prepareOutput(JSONResultConverter.java:128) at com.tinkerpop.rexster.gremlin.converter.JSONResultConverter.convert(JSONResultConverter.java:67) at com.tinkerpop.rexster.gremlin.GremlinExtension.tryExecuteGremlinScript(GremlinExtension.java:278) at com.tinkerpop.rexster.gremlin.GremlinExtension.evaluatePostOnGraph(GremlinExtension.java:193) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.tinkerpop.rexster.AbstractSubResource.invokeExtension(AbstractSubResource.java:322) at com.tinkerpop.rexster.AbstractSubResource.invokeExtension(AbstractSubResource.java:229) at com.tinkerpop.rexster.GraphResource.executeGraphExtension(GraphResource.java:281) at com.tinkerpop.rexster.GraphResource.postGraphExtension(GraphResource.java:201) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205) at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) at com.codahale.metrics.jersey.InstrumentedResourceMethodDispatchProvider$TimedRequestDispatcher.dispatch(InstrumentedResourceMethodDispatchProvider.java:30) at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1511) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1442) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381) at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716) at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) at org.glassfish.grizzly.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:147) at org.glassfish.grizzly.servlet.FilterChainImpl.invokeFilterChain(FilterChainImpl.java:106) at org.glassfish.grizzly.servlet.ServletHandler.doServletService(ServletHandler.java:252) at org.glassfish.grizzly.servlet.ServletHandler.service(ServletHandler.java:188) at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:164) at org.glassfish.grizzly.http.server.HttpHandlerChain.service(HttpHandlerChain.java:196) at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:164) at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:175) at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:265) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200) at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:134) at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112) at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:78) at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:815) at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112) at org.glassfish.grizzly.strategies.LeaderFollowerNIOStrategy.executeIoEvent(LeaderFollowerNIOStrategy.java:102) at org.glassfish.grizzly.strategies.AbstractIOStrategy.executeIoEvent(AbstractIOStrategy.java:88) at org.glassfish.grizzly.nio.SelectorRunner.iterateKeyEvents(SelectorRunner.java:398) at org.glassfish.grizzly.nio.SelectorRunner.iterateKeys(SelectorRunner.java:368) at org.glassfish.grizzly.nio.SelectorRunner.doSelect(SelectorRunner.java:334) at org.glassfish.grizzly.nio.SelectorRunner.run(SelectorRunner.java:264) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:567) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:547) at java.lang.Thread.run(Thread.java:745) Caused by: com.orientechnologies.common.concur.lock.OLockException: Cannot unlock a never acquired lock at com.orientechnologies.orient.core.tx.OTransactionAbstract.unlockRecord(OTransactionAbstract.java:137) at com.orientechnologies.orient.core.id.ORecordId.unlock(ORecordId.java:287) at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.unlockRecord(OAbstractPaginatedStorage.java:1761) at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.readRecord(OAbstractPaginatedStorage.java:1429) at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.readRecord(OAbstractPaginatedStorage.java:694) at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.executeReadRecord(ODatabaseDocumentTx.java:1569) ... 91 more Thanks, Elad On Friday, January 16, 2015 at 12:57:51 AM UTC+2, Jing Chen wrote: > > Hi, > > We are getting a ODatabaseException from our application, and I see this > "Cannot unlock a never acquired lock" error message in the stack trace. > What does this error mean? How can we avoid it? We are using 1.7.10 under > CentOS. > > com.orientechnologies.orient.core.exception.ODatabaseException: Error on > retrieving record #18:27 (cluster: user) > at > com.orientechnologies.orient.core.db.raw.ODatabaseRaw.read(ODatabaseRaw.java:257) > at > com.orientechnologies.orient.core.db.record.ODatabaseRecordAbstract.executeReadRecord(ODatabaseRecordAbstract.java:1005) > at > com.orientechnologies.orient.core.tx.OTransactionNoTx.loadRecord(OTransactionNoTx.java:70) > at > com.orientechnologies.orient.core.db.record.ODatabaseRecordTx.load(ODatabaseRecordTx.java:251) > at > com.orientechnologies.orient.core.db.record.ODatabaseRecordTx.load(ODatabaseRecordTx.java:40) > at > com.orientechnologies.orient.core.id.ORecordId.getRecord(ORecordId.java:298) > at > org.ndexbio.common.models.dao.orientdb.OrientdbDAO.getRecordById(OrientdbDAO.java:71) > at > org.ndexbio.common.models.dao.orientdb.UserDAO.getPendingRequest(UserDAO.java:962) > at > org.ndexbio.rest.services.UserService.getPendingRequests(UserService.java:531) > at sun.reflect.GeneratedMethodAccessor86.invoke(Unknown Source) > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) > at java.lang.reflect.Method.invoke(Unknown Source) > at > org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:137) > at > org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:296) > at > org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:250) > at > org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:237) > at > org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356) > at > org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179) > at > org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220) > at > org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56) > at > org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) > at > org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) > at > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) > at > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) > at > org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) > at > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) > at > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) > at > org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) > at > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) > at > org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) > at > org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070) > at > org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) > at > org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) > at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > at > org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) > at java.lang.Thread.run(Unknown Source) > Caused by: com.orientechnologies.common.concur.lock.OLockException: Cannot > unlock a never acquired lock > at > com.orientechnologies.orient.core.tx.OTransactionAbstract.unlockRecord(OTransactionAbstract.java:119) > at > com.orientechnologies.orient.core.id.ORecordId.unlock(ORecordId.java:272) > at > com.orientechnologies.orient.core.storage.impl.local.paginated.OLocalPaginatedStorage.readRecord(OLocalPaginatedStorage.java:1498) > at > com.orientechnologies.orient.core.storage.impl.local.paginated.OLocalPaginatedStorage.readRecord(OLocalPaginatedStorage.java:754) > at > com.orientechnologies.orient.core.db.raw.ODatabaseRaw.read(ODatabaseRaw.java:250) > ... 41 more > > Thanks, > Jing > > > -- --- You received this message because you are subscribed to the Google Groups "OrientDB" group. 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