Items are failing at "Preparing Deployment" phase, when logs are checked on Deployer, I could see below:

2017-07-10 11:40:53,576 WARN DeployPipelineExecutor - Phase: Deployer Prepare Phase failure message: Unable to rename package to D:\InetPub\Staging\Incoming\Zip\tcm_0-817263-66560.Content.zip for transaction: tcm:0-817263-66560 2017-07-10 11:40:53,592 ERROR DeployPipelineExecutor - Final attempt in Phase: Deployer Prepare Phase failed for transaction: tcm:0-817263-66560 2017-07-10 11:40:53,592 ERROR DeployPipelineExecutor - Original stack trace for transaction: tcm:0-817263-66560 com.tridion.deployer.ProcessingException: Unable to rename package to D:\InetPub\Staging\Incoming\Zip\tcm_0-817263-66560.Content.zip at com.tridion.deployer.workers.UnzipWorker.doWork(UnzipWorker.java:95) ~[cd_deployer.jar:na] at com.tridion.deployer.phases.PreparePhase.execute(PreparePhase.java:45) ~[cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.runMainExecutePhase(DeployPipelineExecutor.java:198) [cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.doExecute(DeployPipelineExecutor.java:100) [cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.execute(DeployPipelineExecutor.java:64) [cd_deployer.jar:na] at com.tridion.deployer.TransactionManager.handleDeployPackage(TransactionManager.java:82) [cd_deployer.jar:na] at com.tridion.deployer.queue.QueueLocationHandler$1.run(QueueLocationHandler.java:180) [cd_deployer.jar:na] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [na:1.7.0_121] at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.7.0_121] at java.lang.Thread.run(Unknown Source) [na:1.7.0_121] 2017-07-10 11:40:53,592 ERROR DeployPipelineExecutor - Unable to start processing deployment package with transactionId: tcm:0-817263-66560 com.tridion.deployer.ProcessingException: Phase: Deployer Prepare Phase failed. Unable to rename package to D:\InetPub\Staging\Incoming\Zip\tcm_0-817263-66560.Content.zip at com.tridion.deployer.phases.DeployPipelineExecutor.runMainExecutePhase(DeployPipelineExecutor.java:209) [cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.doExecute(DeployPipelineExecutor.java:100) [cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.execute(DeployPipelineExecutor.java:64) [cd_deployer.jar:na] at com.tridion.deployer.TransactionManager.handleDeployPackage(TransactionManager.java:82) [cd_deployer.jar:na] at com.tridion.deployer.queue.QueueLocationHandler$1.run(QueueLocationHandler.java:180) [cd_deployer.jar:na] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [na:1.7.0_121] at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.7.0_121] at java.lang.Thread.run(Unknown Source) [na:1.7.0_121] Caused by: com.tridion.deployer.ProcessingException: Unable to rename package to D:\InetPub\Staging\Incoming\Zip\tcm_0-817263-66560.Content.zip at com.tridion.deployer.workers.UnzipWorker.doWork(UnzipWorker.java:95) ~[cd_deployer.jar:na] at com.tridion.deployer.phases.PreparePhase.execute(PreparePhase.java:45) ~[cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.runMainExecutePhase(DeployPipelineExecutor.java:198) [cd_deployer.jar:na] ... 9 common frames omitted 2017-07-10 11:40:53,592 WARN DeployPipelineExecutor - Phase: Deployer Prepare Phase failure message: null for transaction: tcm:0-817263-66560 2017-07-10 11:40:53,592 ERROR DeployPipelineExecutor - Final attempt in Phase: Deployer Prepare Phase failed for transaction: tcm:0-817263-66560 2017-07-10 11:40:53,592 ERROR DeployPipelineExecutor - Original stack trace for transaction: tcm:0-817263-66560 java.nio.channels.OverlappingFileLockException: null at sun.nio.ch.SharedFileLockTable.checkList(Unknown Source) ~[na:1.7.0_121] at sun.nio.ch.SharedFileLockTable.add(Unknown Source) ~[na:1.7.0_121] at sun.nio.ch.FileChannelImpl.tryLock(Unknown Source) ~[na:1.7.0_121] at java.nio.channels.FileChannel.tryLock(Unknown Source) ~[na:1.7.0_121] at com.tridion.util.FileUtils.getExclusiveFileLock(FileUtils.java:703) ~[cd_core.jar:na] at com.tridion.util.JAXBUtil.marshalToFile(JAXBUtil.java:126) ~[cd_core.jar:na] at com.tridion.distribution.deployer.DeployerTransaction.update(DeployerTransaction.java:200) ~[cd_model.jar:na] at java.util.Observable.notifyObservers(Unknown Source) ~[na:1.7.0_121] at java.util.Observable.notifyObservers(Unknown Source) ~[na:1.7.0_121] at com.tridion.distribution.TransactionItem.complete(TransactionItem.java:139) ~[cd_model.jar:na] at com.tridion.deployer.workers.UnzipWorker.doWork(UnzipWorker.java:107) ~[cd_deployer.jar:na] at com.tridion.deployer.phases.PreparePhase.execute(PreparePhase.java:45) ~[cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.runMainExecutePhase(DeployPipelineExecutor.java:198) [cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.doExecute(DeployPipelineExecutor.java:100) [cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.execute(DeployPipelineExecutor.java:64) [cd_deployer.jar:na] at com.tridion.deployer.TransactionManager.handleDeployPackage(TransactionManager.java:82) [cd_deployer.jar:na] at com.tridion.deployer.queue.QueueLocationHandler$1.run(QueueLocationHandler.java:180) [cd_deployer.jar:na] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [na:1.7.0_121] at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.7.0_121] at java.lang.Thread.run(Unknown Source) [na:1.7.0_121] 2017-07-10 11:40:53,592 ERROR DeployPipelineExecutor - Unable to start processing deployment package with transactionId: tcm:0-817263-66560 com.tridion.deployer.ProcessingException: Phase: Deployer Prepare Phase failed. null at com.tridion.deployer.phases.DeployPipelineExecutor.runMainExecutePhase(DeployPipelineExecutor.java:209) [cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.doExecute(DeployPipelineExecutor.java:100) [cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.execute(DeployPipelineExecutor.java:64) [cd_deployer.jar:na] at com.tridion.deployer.TransactionManager.handleDeployPackage(TransactionManager.java:82) [cd_deployer.jar:na] at com.tridion.deployer.queue.QueueLocationHandler$1.run(QueueLocationHandler.java:180) [cd_deployer.jar:na] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [na:1.7.0_121] at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.7.0_121] at java.lang.Thread.run(Unknown Source) [na:1.7.0_121] Caused by: java.nio.channels.OverlappingFileLockException: null at sun.nio.ch.SharedFileLockTable.checkList(Unknown Source) ~[na:1.7.0_121] at sun.nio.ch.SharedFileLockTable.add(Unknown Source) ~[na:1.7.0_121] at sun.nio.ch.FileChannelImpl.tryLock(Unknown Source) ~[na:1.7.0_121] at java.nio.channels.FileChannel.tryLock(Unknown Source) ~[na:1.7.0_121] at com.tridion.util.FileUtils.getExclusiveFileLock(FileUtils.java:703) ~[cd_core.jar:na] at com.tridion.util.JAXBUtil.marshalToFile(JAXBUtil.java:126) ~[cd_core.jar:na] at com.tridion.distribution.deployer.DeployerTransaction.update(DeployerTransaction.java:200) ~[cd_model.jar:na] at java.util.Observable.notifyObservers(Unknown Source) ~[na:1.7.0_121] at java.util.Observable.notifyObservers(Unknown Source) ~[na:1.7.0_121] at com.tridion.distribution.TransactionItem.complete(TransactionItem.java:139) ~[cd_model.jar:na] at com.tridion.deployer.workers.UnzipWorker.doWork(UnzipWorker.java:107) ~[cd_deployer.jar:na] at com.tridion.deployer.phases.PreparePhase.execute(PreparePhase.java:45) ~[cd_deployer.jar:na] at com.tridion.deployer.phases.DeployPipelineExecutor.runMainExecutePhase(DeployPipelineExecutor.java:198) [cd_deployer.jar:na] ... 9 common frames omitted 2017-07-10 11:40:59,613 ERROR QueueLocationHandler - Unable to unmarshall the deployer transaction for the given transaction: tcm:0-817292-66560 javax.xml.bind.UnmarshalException: null at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:213) ~[jaxb-impl.jar:2.1.12] at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:184) ~[jaxb-impl.jar:2.1.12] at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(Unknown Source) ~[na:1.7.0_121] at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(Unknown Source) ~[na:1.7.0_121] at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(Unknown Source) ~[na:1.7.0_121] at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(Unknown Source) ~[na:1.7.0_121] at com.tridion.util.JAXBUtil.unmarshalFromFile(JAXBUtil.java:156) ~[cd_core.jar:na] at com.tridion.deployer.TransactionStateManager.loadTransaction(TransactionStateManager.java:62) ~[cd_deployer.jar:na] at com.tridion.deployer.TransactionStateManager.createOrLoadTransaction(TransactionStateManager.java:43) ~[cd_deployer.jar:na] at com.tridion.deployer.TransactionManager.handleDeployPackage(TransactionManager.java:74) ~[cd_deployer.jar:na] at com.tridion.deployer.queue.QueueLocationHandler$1.run(QueueLocationHandler.java:180) ~[cd_deployer.jar:na] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [na:1.7.0_121] at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.7.0_121] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.7.0_121] at java.lang.Thread.run(Unknown Source) [na:1.7.0_121] Caused by: java.io.IOException: The process cannot access the file because another process has locked a portion of the file at java.io.FileInputStream.readBytes(Native Method) ~[na:1.7.0_121] at java.io.FileInputStream.read(Unknown Source) ~[na:1.7.0_121] at java.io.BufferedInputStream.fill(Unknown Source) ~[na:1.7.0_121] at java.io.BufferedInputStream.read(Unknown Source) ~[na:1.7.0_121] at com.sun.org.apache.xerces.internal.impl.XMLEntityManager$RewindableInputStream.read(Unknown Source) ~[na:1.7.0_121] at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(Unknown Source) ~[na:1.7.0_121] at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(Unknown Source) ~[na:1.7.0_121] at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) ~[na:1.7.0_121] at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) ~[na:1.7.0_121] at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) ~[na:1.7.0_121] at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) ~[na:1.7.0_121] at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) ~[na:1.7.0_121] at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:211) ~[jaxb-impl.jar:2.1.12] ... 15 common frames omitted

Any clues?