这似乎来自码头 NIO 支持——码头似乎认为在关闭空闲连接时记录到 stderr 是合适的。
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.checkIdleTimestamp(SelectChannelEndPoint.java:231)
at org.eclipse.jetty.io.nio.SelectorManager$SelectSet$2.run(SelectorManager.java:768)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436)
对于那些有类似问题的人,我用一个模拟输出流覆盖了 System.err:
public class DebugOutputStream extends OutputStream {
private Logger s_logger = LoggerFactory.getLogger(DebugOutputStream.class);
private final OutputStream m_realStream;
private ByteArrayOutputStream baos = new ByteArrayOutputStream();
private Pattern m_searchFor;
public DebugOutputStream(OutputStream realStream, String regex) {
m_realStream = realStream;
m_searchFor = Pattern.compile(regex);
}
public void write(int b) throws IOException {
baos.write(b);
if (m_searchFor.matcher(baos.toString()).matches()) {
s_logger.info("unwanted output detected", new RuntimeException());
}
if (b == '\n') baos.reset();
m_realStream.write(b);
}
}