src/main/java/com/aliyun/mns/client/impl/topic/SetSubscriptionAttrAction.java [44:52]:
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        try {
            InputStream is = serializer.serialize(reqObject.getMeta(), MNSConstants.DEFAULT_CHARSET);
            requestMessage.setContent(is);
            requestMessage.setContentLength(is.available());
        } catch (Exception e) {
            e.printStackTrace();
            throw new ClientException(e.getMessage(), this.getUserRequestId(), e);
        }
        return requestMessage;
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src/main/java/com/aliyun/mns/client/impl/topic/SubscribeAction.java [47:55]:
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        try {
            InputStream is = serializer.serialize(reqObject.getMeta(), MNSConstants.DEFAULT_CHARSET);
            requestMessage.setContent(is);
            requestMessage.setContentLength(is.available());
        } catch (Exception e) {
            e.printStackTrace();
            throw new ClientException(e.getMessage(), this.getUserRequestId(), e);
        }
        return requestMessage;
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