Great! Thanks.

On Tuesday, January 13, 2015 at 3:06:57 PM UTC-8, Enrico Risa wrote:
>
> Hi Jing
>
> tomorrow i will roll a release with some backports from 2.0,
> so you can try if resolve this issue. I will send you the link
>
> 2015-01-14 0:03 GMT+01:00 Jing Chen <[email protected] <javascript:>>:
>
>> Hi Enrico,
>>
>> I did more tests and it seems the ParseException won't cause the closure 
>> of Lucene index. It is more likely to be the other error:
>>
>> 2015-01-12 16:22:58:555 INFO Account 80421cb7-39f3-11e4-a848-
>> 000c29202374 does not exist for class: user [OrientdbDAO]com.
>> orientechnologies.orient.core.exception.ODatabaseException: Error on 
>> retrieving record #14:507243 (cluster: ndexproperty)
>>         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.OTransactionOptimistic.
>> loadRecord(OTransactionOptimistic.java:227)
>>         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 com.orientechnologies.orient.core.db.record.ridbag.
>> embedded.OEmbeddedRidBag$EntriesIterator.next(OEmbeddedRidBag.java:414)
>>         at com.orientechnologies.orient.core.db.record.ridbag.
>> embedded.OEmbeddedRidBag$EntriesIterator.next(OEmbeddedRidBag.java:385)
>>         at com.orientechnologies.orient.core.command.traverse.
>> OTraverseMultiValueProcess.process(OTraverseMultiValueProcess.java:36)
>>         at com.orientechnologies.orient.core.command.traverse.
>> OTraverseMultiValueProcess.process(OTraverseMultiValueProcess.java:24)
>>         at com.orientechnologies.orient.core.command.traverse.
>> OTraverse.next(OTraverse.java:101)
>>         at com.orientechnologies.orient.core.command.traverse.
>> OTraverse.hasNext(OTraverse.java:71)
>>         at org.ndexbio.common.models.dao.orientdb.NetworkDAO.
>> getPropertiesFromDocument(NetworkDAO.java:723)
>>         at org.ndexbio.common.models.dao.orientdb.NetworkDAO.
>> setNetworkSummary(NetworkDAO.java:1318)
>>         at org.ndexbio.common.models.dao.orientdb.NetworkDAO.
>> getNetworkSummary(NetworkDAO.java:1326)
>>         at org.ndexbio.common.models.dao.orientdb.NetworkSearchDAO.
>> findAllNetworks(NetworkSearchDAO.java:121)
>>         at org.ndexbio.common.models.dao.orientdb.NetworkSearchDAO.
>> findNetworks(NetworkSearchDAO.java:71)
>>         at org.ndexbio.rest.services.NetworkAService.searchNetwork(
>> NetworkAService.java:802)
>> - show quoted text -
>>         at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.
>> run(JIoEndpoint.java:314)
>>
>>         at java.util.concurrent.ThreadPoolExecutor.runWorker(
>> ThreadPoolExecutor.java:1145)
>>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(
>> ThreadPoolExecutor.java:615)
>>         at org.apache.tomcat.util.threads.TaskThread$
>> WrappingRunnable.run(TaskThread.java:61)
>>         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: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)
>>         ... 50 more
>>
>> Error during context close for db plocal:/opt/ndex/orientdb/
>> databases/ndex
>> com.orientechnologies.orient.core.exception.OTransactionException: 
>> Transaction was rolled back more times than it was started.
>>         at com.orientechnologies.orient.core.tx.OTransactionOptimistic.
>> rollback(OTransactionOptimistic.java:177)
>>         at com.orientechnologies.orient.core.db.record.
>> ODatabaseRecordTx.commit(ODatabaseRecordTx.java:152)
>>         at com.orientechnologies.orient.core.db.document.
>> ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:511)
>>         at com.orientechnologies.orient.core.db.document.
>> ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:503)
>>         at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.
>> removeContext(OrientBaseGraph.java:1540)
>>         at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.
>> shutdown(OrientBaseGraph.java:900)
>>         at org.ndexbio.common.models.dao.orientdb.UserDAO.close(
>> UserDAO.java:1043)
>>         at org.ndexbio.rest.services.UserService.getPendingRequests(
>> UserService.java:501)
>>         at sun.reflect.GeneratedMethodAccessor161.invoke(Unknown Source)
>> - show quoted text -
>>         at sun.reflect.GeneratedMethodAccessor109.invoke(Unknown Source)
>>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(
>> DelegatingMethodAccessorImpl.java:43)
>>         at java.lang.reflect.Method.invoke(Method.java:606)
>>         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)
>>
>>
>> On Tuesday, January 13, 2015 at 1:54:39 AM UTC-8, Enrico Risa wrote:
>>>
>>> Hi Jing
>>>
>>> i see this error:
>>>
>>> Caused by: org.apache.lucene.queryparser.classic.ParseException: Cannot 
>>> parse '*hoxd3': '*' or '?' not allowed as first character in WildcardQuery
>>>
>>> is not a valid syntax syntax 
>>>
>>> But after this error you got
>>> "targetGen=14871" right?
>>>
>>> We have done a ton of fixes on lucene indexing in 2.0 as it was the 
>>> target for the stable plugin
>>>
>>> I see if we can backports these fixes and if resolves you this problem
>>>
>>> Enrico
>>>
>>> 2015-01-13 10:47 GMT+01:00 Jing Chen <[email protected]>:
>>>
>>>> Hi Enrico,
>>>>
>>>> This error came out again and completely brought the search function 
>>>> down in our production site. It becomes a very critical issue for us, and 
>>>> we really appreciate if you can help us to resolve this issue.
>>>>
>>>> Here are some more information I found from our tomcat log. Hope it can 
>>>> provide some hints for you to reproduce the problem. Basically we saw a 
>>>> few 
>>>> errors happened before the "targetGen=14871" happened. This time it is not 
>>>> doing bulk inserts.
>>>>
>>>> One of them is this exception:
>>>>
>>>> com.orientechnologies.orient.core.exception.ODatabaseException: 
>>>> Database instance has been released to the pool. Get another database 
>>>> instance from the pool with the right username and password
>>>>         at com.orientechnologies.orient.core.db.document.
>>>> ODatabaseDocumentTxPooled.checkOpeness(ODatabaseDocumentTxPooled.
>>>> java:133)
>>>>         at com.orientechnologies.orient.core.db.
>>>> ODatabaseWrapperAbstract.getClusterNameById(
>>>> ODatabaseWrapperAbstract.java:190)
>>>>         at com.orientechnologies.orient.core.metadata.schema.
>>>> OClassImpl.readableClusters(OClassImpl.java:122)
>>>>         at com.orientechnologies.orient.core.iterator.
>>>> ORecordIteratorClass.<init>(ORecordIteratorClass.java:71)
>>>>         at com.orientechnologies.orient.core.iterator.
>>>> ORecordIteratorClass.<init>(ORecordIteratorClass.java:56)
>>>>         at com.orientechnologies.orient.core.db.document.
>>>> ODatabaseDocumentTx.browseClass(ODatabaseDocumentTx.java:209)
>>>>         at com.orientechnologies.orient.core.db.document.
>>>> ODatabaseDocumentTx.browseClass(ODatabaseDocumentTx.java:197)
>>>>         ...
>>>>
>>>> Another exception was 
>>>>
>>>> com.orientechnologies.orient.core.index.OIndexException: Error parsing 
>>>> lucene query 
>>>>         at com.orientechnologies.lucene.manager.
>>>> OLuceneFullTextIndexManager.get(OLuceneFullTextIndexManager.java:114)
>>>>         at com.orientechnologies.lucene.OLuceneIndexEngine.get(
>>>> OLuceneIndexEngine.java:155)
>>>>         at com.orientechnologies.lucene.index.OLuceneFullTextIndex.
>>>> get(OLuceneFullTextIndex.java:111)
>>>>         at com.orientechnologies.lucene.index.OLuceneFullTextIndex.
>>>> get(OLuceneFullTextIndex.java:38)
>>>>         at com.orientechnologies.orient.core.index.
>>>> OIndexAbstractDelegate.get(OIndexAbstractDelegate.java:57)
>>>>         at com.orientechnologies.orient.core.index.
>>>> OIndexTxAwareMultiValue.get(OIndexTxAwareMultiValue.java:275)
>>>>         at com.orientechnologies.orient.core.index.
>>>> OIndexTxAwareMultiValue.get(OIndexTxAwareMultiValue.java:43)
>>>>         at org.ndexbio.common.models.dao.orientdb.NetworkSearchDAO.
>>>> findNetworksV2(NetworkSearchDAO.java:206)
>>>>         at org.ndexbio.common.models.dao.orientdb.NetworkSearchDAO.
>>>> findNetworks(NetworkSearchDAO.java:73)
>>>>         at org.ndexbio.rest.services.NetworkAService.searchNetwork(
>>>> NetworkAService.java:802)
>>>>
>>>>         at sun.reflect.GeneratedMethodAccessor109.invoke(Unknown 
>>>> Source)
>>>>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(
>>>> DelegatingMethodAccessorImpl.java:43)
>>>>         at java.lang.reflect.Method.invoke(Method.java:606)
>>>>         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$SocketProcessor.
>>>> run(JIoEndpoint.java:314)
>>>>         at java.util.concurrent.ThreadPoolExecutor.runWorker(
>>>> ThreadPoolExecutor.java:1145)
>>>>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(
>>>> ThreadPoolExecutor.java:615)
>>>>         at org.apache.tomcat.util.threads.TaskThread$
>>>> WrappingRunnable.run(TaskThread.java:61)
>>>>         at java.lang.Thread.run(Thread.java:745)
>>>> Caused by: org.apache.lucene.queryparser.classic.ParseException: 
>>>> Cannot parse '*hoxd3': '*' or '?' not allowed as first character in 
>>>> WildcardQuery
>>>>         at org.apache.lucene.queryparser.classic.QueryParserBase.parse(
>>>> QueryParserBase.java:125)
>>>>         at com.orientechnologies.lucene.OLuceneIndexType.
>>>> getQueryParser(OLuceneIndexType.java:126)
>>>>         at com.orientechnologies.lucene.OLuceneIndexType.
>>>> createFullQuery(OLuceneIndexType.java:112)
>>>>         at com.orientechnologies.lucene.manager.
>>>> OLuceneFullTextIndexManager.get(OLuceneFullTextIndexManager.java:107)
>>>>         ... 42 more
>>>> Caused by: org.apache.lucene.queryparser.classic.ParseException: '*' 
>>>> or '?' not allowed as first character in WildcardQuery
>>>>         at org.apache.lucene.queryparser.classic.QueryParserBase.
>>>> getWildcardQuery(QueryParserBase.java:734)
>>>>         at org.apache.lucene.queryparser.classic.MultiFieldQueryParser.
>>>> getWildcardQuery(MultiFieldQueryParser.java:200)
>>>>         at org.apache.lucene.queryparser.classic.MultiFieldQueryParser.
>>>> getWildcardQuery(MultiFieldQueryParser.java:195)
>>>>         at org.apache.lucene.queryparser.classic.QueryParserBase.
>>>> handleBareTokenQuery(QueryParserBase.java:832)
>>>>         at org.apache.lucene.queryparser.classic.QueryParser.Term(
>>>> QueryParser.java:358)
>>>>         at org.apache.lucene.queryparser.classic.QueryParser.Clause(
>>>> QueryParser.java:257)
>>>>         at org.apache.lucene.queryparser.classic.QueryParser.Query(
>>>> QueryParser.java:181)
>>>>         at org.apache.lucene.queryparser.classic.QueryParser.
>>>> TopLevelQuery(QueryParser.java:170)
>>>>         at org.apache.lucene.queryparser.classic.QueryParserBase.parse(
>>>> QueryParserBase.java:120)
>>>>         ... 45 more
>>>>
>>>> Then we got this error:
>>>>
>>>> 2015-01-12 16:22:58:555 INFO Account 80421cb7-39f3-11e4-a848-000c29202374 
>>>> does not exist for class: user [OrientdbDAO]com.
>>>> orientechnologies.orient.core.exception.ODatabaseException: Error on 
>>>> retrieving record #14:507243 (cluster: ndexproperty)
>>>>         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.OTransactionOptimistic.
>>>> loadRecord(OTransactionOptimistic.java:227)
>>>>         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 com.orientechnologies.orient.core.db.record.ridbag.
>>>> embedded.OEmbeddedRidBag$EntriesIterator.next(OEmbeddedRidBag.java:414)
>>>>         at com.orientechnologies.orient.core.db.record.ridbag.
>>>> embedded.OEmbeddedRidBag$EntriesIterator.next(OEmbeddedRidBag.java:385)
>>>>         at com.orientechnologies.orient.core.command.traverse.
>>>> OTraverseMultiValueProcess.process(OTraverseMultiValueProcess.java:36)
>>>>         at com.orientechnologies.orient.core.command.traverse.
>>>> OTraverseMultiValueProcess.process(OTraverseMultiValueProcess.java:24)
>>>>         at com.orientechnologies.orient.core.command.traverse.
>>>> OTraverse.next(OTraverse.java:101)
>>>>         at com.orientechnologies.orient.core.command.traverse.
>>>> OTraverse.hasNext(OTraverse.java:71)
>>>>         at org.ndexbio.common.models.dao.orientdb.NetworkDAO.
>>>> getPropertiesFromDocument(NetworkDAO.java:723)
>>>>         at org.ndexbio.common.models.dao.orientdb.NetworkDAO.
>>>> setNetworkSummary(NetworkDAO.java:1318)
>>>>         at org.ndexbio.common.models.dao.orientdb.NetworkDAO.
>>>> getNetworkSummary(NetworkDAO.java:1326)
>>>>         at org.ndexbio.common.models.dao.orientdb.NetworkSearchDAO.
>>>> findAllNetworks(NetworkSearchDAO.java:121)
>>>>         at org.ndexbio.common.models.dao.orientdb.NetworkSearchDAO.
>>>> findNetworks(NetworkSearchDAO.java:71)
>>>>         at org.ndexbio.rest.services.NetworkAService.searchNetwork(
>>>> NetworkAService.java:802)
>>>>
>>>>         at sun.reflect.GeneratedMethodAccessor109.invoke(Unknown 
>>>> Source)
>>>>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(
>>>> DelegatingMethodAccessorImpl.java:43)
>>>>         at java.lang.reflect.Method.invoke(Method.java:606)
>>>>         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$SocketProcessor.
>>>> run(JIoEndpoint.java:314)
>>>>         at java.util.concurrent.ThreadPoolExecutor.runWorker(
>>>> ThreadPoolExecutor.java:1145)
>>>>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(
>>>> ThreadPoolExecutor.java:615)
>>>>         at org.apache.tomcat.util.threads.TaskThread$
>>>> WrappingRunnable.run(TaskThread.java:61)
>>>>         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: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)
>>>>         ... 50 more
>>>> Error during context close for db plocal:/opt/ndex/orientdb/
>>>> databases/ndex
>>>> com.orientechnologies.orient.core.exception.OTransactionException: 
>>>> Transaction was rolled back more times than it was started.
>>>>         at com.orientechnologies.orient.core.tx.OTransactionOptimistic.
>>>> rollback(OTransactionOptimistic.java:177)
>>>>         at com.orientechnologies.orient.core.db.record.
>>>> ODatabaseRecordTx.commit(ODatabaseRecordTx.java:152)
>>>>         at com.orientechnologies.orient.core.db.document.
>>>> ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:511)
>>>>         at com.orientechnologies.orient.core.db.document.
>>>> ODatabaseDocumentTx.commit(ODatabaseDocumentTx.java:503)
>>>>         at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.
>>>> removeContext(OrientBaseGraph.java:1540)
>>>>         at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.
>>>> shutdown(OrientBaseGraph.java:900)
>>>>         at org.ndexbio.common.models.dao.orientdb.UserDAO.close(
>>>> UserDAO.java:1043)
>>>>         at org.ndexbio.rest.services.UserService.getPendingRequests(
>>>> UserService.java:501)
>>>>         at sun.reflect.GeneratedMethodAccessor161.invoke(Unknown 
>>>> Source)
>>>>
>>>>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(
>>>> DelegatingMethodAccessorImpl.java:43)
>>>>         at java.lang.reflect.Method.invoke(Method.java:606)
>>>>         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$SocketProcessor.
>>>> run(JIoEndpoint.java:316)
>>>>         at java.util.concurrent.ThreadPoolExecutor.runWorker(
>>>> ThreadPoolExecutor.java:1145)
>>>>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(
>>>> ThreadPoolExecutor.java:615)
>>>>         at org.apache.tomcat.util.threads.TaskThread$
>>>> WrappingRunnable.run(TaskThread.java:61)
>>>>         at java.lang.Thread.run(Thread.java:745)
>>>> org.apache.lucene.store.AlreadyClosedException: this IndexWriter is 
>>>> closed
>>>>         at org.apache.lucene.index.IndexWriter.ensureOpen(
>>>> IndexWriter.java:645)
>>>>         at org.apache.lucene.index.IndexWriter.ensureOpen(
>>>> IndexWriter.java:659)
>>>>         at org.apache.lucene.index.IndexWriter.commit(
>>>> IndexWriter.java:2988)
>>>>         at com.orientechnologies.lucene.manager.
>>>> OLuceneIndexManagerAbstract.commit(OLuceneIndexManagerAbstract.
>>>> java:118)
>>>>         at com.orientechnologies.lucene.OLuceneIndexEngine.closeDb(
>>>> OLuceneIndexEngine.java:139)
>>>>         at com.orientechnologies.orient.core.index.OIndexAbstract.
>>>> onClose(OIndexAbstract.java:802)
>>>>         at com.orientechnologies.orient.core.db.record.
>>>> ODatabaseRecordAbstract.callOnCloseListeners(
>>>> ODatabaseRecordAbstract.java:1536)
>>>>         at com.orientechnologies.orient.core.db.document.
>>>> ODatabaseDocumentTxPooled.close(ODatabaseDocumentTxPooled.java:112)
>>>>         at org.ndexbio.rest.services.NetworkAService.searchNetwork(
>>>> NetworkAService.java:805)
>>>>         at sun.reflect.GeneratedMethodAccessor109.invoke(Unknown 
>>>> Source)
>>>>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(
>>>> DelegatingMethodAccessorImpl.java:43)
>>>>         at java.lang.reflect.Method.invoke(Method.java:606)
>>>>         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)
>>>>    ...
>>>>
>>>>
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>>>>
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