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我試圖用AsynchronousFileChannel.write寫入到文件的圖像：AsynchronousFileChannel寫失敗
...
Path filePath = Paths.get(path + "/" + System.currentTimeMillis()
+ ".jpeg");
try (AsynchronousFileChannel channel = AsynchronousFileChannel.open(filePath,
StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE);) {
CompletionHandler<Integer, Object> handler = new CompletionHandler<Integer, Object>() {
@Override
public void failed(Throwable exc, Object attachment) {
logger.error("Write failed: ", exc);
}
@Override
public void completed(Integer result, Object attachment) {
...
}
};
ByteBuf buffer = Unpooled.buffer(request.getImage().length);
buffer.writeBytes(request.getImage());
channel.write(buffer.nioBuffer(), 0, null, handler);
} catch (IOException e) {
logger.error("Failed to open file: ", e);
throw new RuntimeException(e);
}
....
我經常收到以下異常：
java.nio.channels.AsynchronousCloseException: null
at sun.nio.ch.SimpleAsynchronousFileChannelImpl$3.run(SimpleAsynchronousFileChannelImpl.java:380) ~[na:1.8.0_25]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_25]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_25]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_25]
我使用Linux上運行該代碼Oracle JDK 8u25。在Windows上這是一個例外。當我在調試模式下運行的代碼，踏過的每行代碼我也注意到，它很少發生。
當我不使用CompletionHandler，而是使用：
Future<Integer> writeFuture = channel.write(buffer.nioBuffer(), 0);
Integer integer = writeFuture.get();
我不明白的例外。
這可能是什麼原因造成的？