Andrey created FLINK-6370:
-----------------------------
Summary: FileAlreadyExistsException on startup
Key: FLINK-6370
URL: https://issues.apache.org/jira/browse/FLINK-6370
Project: Flink
Issue Type: Bug
Components: Webfrontend
Affects Versions: 1.2.0
Reporter: Andrey
Currently static web resources are lazily cached onto disk during first
request. However if 2 concurrent requests will be executed, then
FileAlreadyExistsException will be in logs.
{code}
2017-04-24 14:00:58,075 ERROR
org.apache.flink.runtime.webmonitor.files.StaticFileServerHandler - error
while responding [nioEventLoopGroup-3-2]
java.nio.file.FileAlreadyExistsException:
/flink/web/flink-web-528f8cb8-dd60-433c-8f6c-df49ad0b79e0/index.html
at
sun.nio.fs.UnixException.translateToIOException(UnixException.java:88)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
at
sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:214)
at
java.nio.file.spi.FileSystemProvider.newOutputStream(FileSystemProvider.java:434)
at java.nio.file.Files.newOutputStream(Files.java:216)
at java.nio.file.Files.copy(Files.java:3016)
at
org.apache.flink.runtime.webmonitor.files.StaticFileServerHandler.respondAsLeader(StaticFileServerHandler.java:238)
at
org.apache.flink.runtime.webmonitor.files.StaticFileServerHandler.channelRead0(StaticFileServerHandler.java:197)
at
org.apache.flink.runtime.webmonitor.files.StaticFileServerHandler.channelRead0(StaticFileServerHandler.java:99)
at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
at io.netty.handler.codec.http.router.Handler.routed(Handler.java:62)
{code}
Expect:
* extract all static resources on startup in main thread and before opening
http port.
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