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Unable to save to remote cache with an IOException "Is a directory" #353

@juliojgd

Description

@juliojgd

Affected version

1.2.0

Bug description

We are observing several stacktraces like this one:

[INFO] Unable to save to remote cache https://mycompany.jfrog.io/artifactory/build-cache-maven/v1.1/com.mycompany.myapplication/my-application-plugin/212345678909325087e5a322c792aa5b6c7b2c9a66002d1a4df26458e9e8a26f/my-application-plugin.jar java.io.IOException: Is a directory at sun.nio.ch.FileDispatcherImpl.read0 (Native Method) at sun.nio.ch.FileDispatcherImpl.read (FileDispatcherImpl.java:48) at sun.nio.ch.IOUtil.readIntoNativeBuffer (IOUtil.java:330) at sun.nio.ch.IOUtil.read (IOUtil.java:296) at sun.nio.ch.IOUtil.read (IOUtil.java:273) at sun.nio.ch.FileChannelImpl.read (FileChannelImpl.java:232) at sun.nio.ch.ChannelInputStream.read (ChannelInputStream.java:65) at sun.nio.ch.ChannelInputStream.read (ChannelInputStream.java:107) at sun.nio.ch.ChannelInputStream.read (ChannelInputStream.java:101) at java.io.InputStream.read (InputStream.java:218) at org.eclipse.aether.spi.connector.transport.AbstractTransporter.copy (AbstractTransporter.java:164) at org.eclipse.aether.spi.connector.transport.AbstractTransporter.utilPut (AbstractTransporter.java:134) at org.eclipse.aether.transport.http.HttpTransporter.access$400 (HttpTransporter.java:101) at org.eclipse.aether.transport.http.HttpTransporter$PutTaskEntity.writeTo (HttpTransporter.java:689) at org.apache.http.impl.DefaultBHttpClientConnection.sendRequestEntity (DefaultBHttpClientConnection.java:156) at org.apache.http.impl.conn.CPoolProxy.sendRequestEntity (CPoolProxy.java:152) at org.apache.http.protocol.HttpRequestExecutor.doSendRequest (HttpRequestExecutor.java:238) at org.apache.http.protocol.HttpRequestExecutor.execute (HttpRequestExecutor.java:123) at org.apache.http.impl.execchain.MainClientExec.execute (MainClientExec.java:272) at org.apache.http.impl.execchain.ProtocolExec.execute (ProtocolExec.java:186) at org.apache.http.impl.execchain.RetryExec.execute (RetryExec.java:89) at org.apache.http.impl.execchain.RedirectExec.execute (RedirectExec.java:110) at org.apache.http.impl.client.InternalHttpClient.doExecute (InternalHttpClient.java:185) at org.apache.http.impl.client.CloseableHttpClient.execute (CloseableHttpClient.java:72) at org.eclipse.aether.transport.http.HttpTransporter.execute (HttpTransporter.java:441) at org.eclipse.aether.transport.http.HttpTransporter.implPut (HttpTransporter.java:425) at org.eclipse.aether.spi.connector.transport.AbstractTransporter.put (AbstractTransporter.java:107) at org.apache.maven.buildcache.RemoteCacheRepositoryImpl.putToRemoteCache (RemoteCacheRepositoryImpl.java:250) at org.apache.maven.buildcache.RemoteCacheRepositoryImpl.saveArtifactFile (RemoteCacheRepositoryImpl.java:142) at org.apache.maven.buildcache.LocalCacheRepositoryImpl.saveArtifactFile (LocalCacheRepositoryImpl.java:359) at org.apache.maven.buildcache.CacheControllerImpl.save (CacheControllerImpl.java:534) at org.apache.maven.buildcache.BuildCacheMojosExecutionStrategy.execute (BuildCacheMojosExecutionStrategy.java:160) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:159) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:105) at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:193) at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:180) at java.util.concurrent.FutureTask.run (FutureTask.java:264) at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539) at java.util.concurrent.FutureTask.run (FutureTask.java:264) at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1136) at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:635) at java.lang.Thread.run (Thread.java:840) 

Our maven build cache configuration seems to work OK but this stackttrace is printed several times in the build.

Is it expected?

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