The process cannot access the file because it is being used by another process.

[oraix]

总是出现这个错误，并无限循环
The process cannot access the file because it is being used by another process.

用proexp查看并未发现那个进程在占用，查看目标目录中，能找到play-jdbc-api_2.11-2.5.0-sources.jar.sha1这个文件，里面也有内容。也可正常删除。

SBT改用oschina源后没有问题。

Using client of fast-upstream for koala
03-15 08:45:55.383 �[1;31mERROR�[0;39m akka.actor.OneForOneStrategy akka://repox/user/RequestQueueMaster/GetQueueWorker_187535/GetMaster_187536
�[34mC:\Users\me.repox\storage\temp\repox9210516608242367649.tmp -> C:\Users\me.repox\storage\com\typesafe\play\play-jdbc-api_2.11\2.5.0\play-jdbc-api_2.11-2.5.0-sources.jar.sha1: The process cannot access the file because it is being used by another process.
�[0;39m

java.nio.file.FileSystemException: C:\Users\me.repox\storage\temp\repox9210516608242367649.tmp -> C:\Users\me.repox\storage\com\typesafe\play\play-jdbc-api_2.11\2.5.0\play-jdbc-api_2.11-2.5.0-sources.jar.sha1: The process cannot access the file because it is being used by another process.

    at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:86) ~[na:1.8.0_45]
    at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97) ~[na:1.8.0_45]
    at sun.nio.fs.WindowsFileCopy.move(WindowsFileCopy.java:301) ~[na:1.8.0_45]
    at sun.nio.fs.WindowsFileSystemProvider.move(WindowsFileSystemProvider.java:287) ~[na:1.8.0_45]
    at java.nio.file.Files.move(Files.java:1395) ~[na:1.8.0_45]
    at com.gtan.repox.GetMaster$$anonfun$gettingChecksum$1.applyOrElse(GetMaster.scala:181) ~[repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at akka.actor.Actor$class.aroundReceive(Actor.scala:480) ~[repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at com.gtan.repox.GetMaster.aroundReceive(GetMaster.scala:31) ~[repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526) [repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at akka.actor.ActorCell.invoke(ActorCell.scala:495) [repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257) [repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at akka.dispatch.Mailbox.run(Mailbox.scala:224) [repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at akka.dispatch.Mailbox.exec(Mailbox.scala:234) [repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [repox-assembly-0.1-SNAPSHOT.jar:0.1-SNAPSHOT]

Using client of fast-upstream for oschina
03-15 08:45:55.390 �[39mDEBUG�[0;39m com.gtan.repox.GetMaster akka://repox/user/RequestQueueMaster/GetQueueWorker_187535/GetMaster_187536

[Centaur]

感谢提交此问题。

目标文件存在这个事实应该就是问题所在。此时repox所做的操作是将刚从上游下载到临时文件移动为目标文件，只有当目标文件之前不存在时才会触发下载操作。可能是哪里的时序出现了问题。看 stacktrace 你应该是在 windows 上运行的 repox. Windows 环境下确实缺乏测试。有待重现。

一个题外话是koala仓库似乎对外部用户不是特别友好，在社区公服上已经把koala仓库禁掉了。目前公服上优先级为 1 的三个主要 maven 仓库是：

oschina: http://maven.oschina.net/content/groups/public
tmatesoft: http://maven.tmatesoft.com/content/groups/public
google-mirror: https://maven-central.storage.googleapis.com (是的，国内可以正常访问)

[irhawks]

使用Windows下面的Oracle JDK8，遇到同样的问题：

主要表现：持续下载文件，但是每次从临时文件中拷贝jar文件时总是出现错误

Using client of fast-upstream for koala
11-29 10:39:18.831 �[39mDEBUG�[0;39m com.gtan.repox.GetWorker akka://repox/user/
RequestQueueMaster/GetQueueWorker_29/GetMaster_30/GetWorker_sonatype_56
�[34mdownloaded 40 bytes. 100.00 %�[0;39m

11-29 10:39:18.832 �[34mINFO �[0;39m com.gtan.repox.GetMaster akka://repox/user/
RequestQueueMaster/GetQueueWorker_29/GetMaster_30
�[34mGetWorker GetWorker_sonatype_56 completed /com/stratio/datasource/spark-mo
ngodb_2.11/0.12.0/spark-mongodb_2.11-0.12.0.jar. Checksum success�[0;39m

11-29 10:39:18.834 �[1;31mERROR�[0;39m akka.actor.OneForOneStrategy akka://repox
/user/RequestQueueMaster/GetQueueWorker_29/GetMaster_30
�[34mC:\Users\user9.repox\storage\temp\6302\repox1795478119027292363.tmp -> C:
\Users\user9.repox\storage\com\stratio\datasource\spark-mongodb_2.11\0.12.0\spa
rk-mongodb_2.11-0.12.0.jar: 另一个程序正在使用此文件，进程无法访问。
�[0;39m

java.nio.file.FileSystemException: C:\Users\user9.repox\storage\temp\6302\repox
1795478119027292363.tmp -> C:\Users\user9.repox\storage\com\stratio\datasource
spark-mongodb_2.11\0.12.0\spark-mongodb_2.11-0.12.0.jar: 另一个程序正在使用此文
件，进程无法访问。

    at sun.nio.fs.WindowsException.translateToIOException(WindowsException.j

ava:86)
at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.jav
a:97)
at sun.nio.fs.WindowsFileCopy.move(WindowsFileCopy.java:301)
at sun.nio.fs.WindowsFileSystemProvider.move(WindowsFileSystemProvider.j
ava:287)
at java.nio.file.Files.move(Files.java:1395)
at com.gtan.repox.GetMaster$$anonfun$gettingChecksum$1.applyOrElse(GetMa
ster.scala:193)
at akka.actor.Actor.aroundReceive(Actor.scala:497)
at akka.actor.Actor.aroundReceive$(Actor.scala:495)
at com.gtan.repox.GetMaster.aroundReceive(GetMaster.scala:43)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
at akka.actor.ActorCell.invoke(ActorCell.scala:495)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
at akka.dispatch.Mailbox.run(Mailbox.scala:224)
at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java
:902)
at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1689)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1644)
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.ja
va:157)
11-29 10:39:18.840 �[39mDEBUG�[0;39m com.gtan.repox.GetMaster akka://repox/user/
RequestQueueMaster/GetQueueWorker_29/GetMaster_30
�[34mTry Vector(Vector(koala), Vector(sonatype, oschina), Vector(central)) /com
/stratio/datasource/spark-mongodb_2.11/0.12.0/spark-mongodb_2.11-0.12.0.jar�[0;3
9m