java.lang.NullPointerException: null

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java.lang.NullPointerException: null
at org.jclouds.blobstore.config.LocalBlobStore.maybeQuoteETag(LocalBlobStore.java:938)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.google.inject.internal.DelegatingInvocationHandler.invoke(DelegatingInvocationHandler.java:37)
at com.sun.proxy.$Proxy39.copyBlob(Unknown Source)
at org.gaul.s3proxy.S3ProxyHandler.handleCopyBlob(S3ProxyHandler.java:1548)
at org.gaul.s3proxy.S3ProxyHandler.doHandle(S3ProxyHandler.java:583)
at org.gaul.s3proxy.S3ProxyHandler.handle(S3ProxyHandler.java:255)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:499)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at java.lang.Thread.run(Thread.java:745)

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