The code may throw an exception before the tc is closed，you should use try-catch-finally or try-with-resource to close resource

[QiAnXinCodeSafe]

nacos/common/src/main/java/com/alibaba/nacos/common/utils/IoUtils.java

Lines 309 to 320 in 00d4363

	try {
	tc = new FileOutputStream(tf).getChannel();
	sc = new FileInputStream(sf).getChannel();
	sc.transferTo(0, sc.size(), tc);
	} finally {
	if (null != sc) {
	sc.close();
	}
	if (null != tc) {
	tc.close();
	}
	}

sc.close() may be throw an exception

nacos/common/src/main/java/com/alibaba/nacos/common/http/client/request/JdkHttpClientRequest.java

Lines 104 to 106 in 00d4363

	conn.getOutputStream().write(b, 0, b.length);
	conn.getOutputStream().flush();
	conn.getOutputStream().close();

nacos/common/src/main/java/com/alibaba/nacos/common/utils/ResourceUtils.java

Lines 144 to 146 in 00d4363

	InputStream in = getResourceAsStream(loader, resource);
	props.load(in);
	in.close();