You need to enable JavaScript to run this app.
优惠活动
大模型
产品
解决方案
定价
更多

使用PDFBox合并S3中PDF文件时遇End-of-file异常排查

avatar
DevOps 小满
2026-8-25
问题描述

我在AWS S3上存储了多个PDF文件，想要合并成一个PDF。通过InputStream数组读取S3文件后用PDF合并工具处理，循环添加所有InputStream后执行合并的代码可以正常运行：

for (PS3ObjectStream pFileS3Obj: PS3ObjectStream ) {
    try {
        pdfMerger.addSource(pFileS3Obj.getS3ObjectInputStream());
        
    }catch(Exception e) {
        e.printStackTrace();
    }
}
pdfMerger.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());

但循环内每次添加InputStream后就执行合并的代码报错：End-of-file , expected line，异常栈如下：

java.io.IOException: Error: End-of-File, expected line
at org.apache.pdfbox.pdfparser.BaseParser.readLine(BaseParser.java:1107)
at org.apache.pdfbox.pdfparser.COSParser.parseHeader(COSParser.java:2650)
at org.apache.pdfbox.pdfparser.COSParser.parsePDFHeader(COSParser.java:2633)
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:219)
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1230)
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1148)
at org.apache.pdfbox.multipdf.PDFMergerUtility.legacyMergeDocuments(PDFMergerUtility.java:455)
at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:346)
at com.djcs.pslintegration.pdfutility.mergeService.MergePdfFileService.mergePDfFiles(MergePdfFileService.java:92)
at com.djcs.pslintegration.pdfutility.mergeService.MergePdfFileService.combinePdfFiles(MergePdfFileService.java:47)
at com.djcs.pslintegration.pdfutility.controller.PDFUtilityController.combinePdfFiles(PDFUtilityController.java:98)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
排查与解决方向
  • 理解PDFMergerUtility工作机制：PDFMergerUtility调用mergeDocuments后，会消费所有已添加的InputStream，且内部会清空源列表。第二次循环时，再次添加新流后调用合并，工具可能处于异常状态，尝试读取已消费的流导致EOF错误。
  • 检查InputStream可复用性：S3的S3ObjectInputStream是一次性的，被读取后无法再次读取。第一次合并已将流读完，后续操作复用该流会读到文件末尾。
  • 调整分批合并逻辑：若需每次添加一个文件就合并到目标PDF，需每次创建新的PDFMergerUtility实例，或把每次合并的结果作为下一次的源。示例代码：
    PDDocument mergedDoc = null;
for (PS3ObjectStream pFileS3Obj : PS3ObjectStream) {
    try (InputStream is = pFileS3Obj.getS3ObjectInputStream()) {
        PDDocument currentDoc = PDDocument.load(is);
        if (mergedDoc == null) {
            mergedDoc = currentDoc;
        } else {
            PDFMergerUtility merger = new PDFMergerUtility();
            merger.addSource(mergedDoc);
            merger.addSource(currentDoc);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            merger.setDestinationStream(baos);
            mergedDoc.close(); // 关闭旧的合并文档
            mergedDoc = merger.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
            currentDoc.close();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}
// 最后处理合并后的mergedDoc，比如写入S3或本地文件
  • 验证S3文件完整性：异常栈显示解析PDF头失败，不排除个别S3文件损坏。可单独读取每个文件的流，尝试解析为PDDocument，确认是否有报错。
  • 检查PDFBox版本：不同版本的PDFMergerUtility内部实现有差异，可能是版本bug导致状态异常，尝试升级到最新稳定版。

内容的提问来源于stack exchange，提问作者John D

相关产品推荐
方舟 Agent Plan

超全模态模型 × Harness 升级，最新支持 Deepseek-V4.1-Flash、GLM-5.3 系列、Doubao-Seedream-5.0-pro、Kimi-K3 (部分)， 限时 9.9 元起

产品介绍相关文档
相关产品推荐
方舟 Agent Plan

超全模态模型 × Harness 升级，最新支持 Deepseek-V4.1-Flash、GLM-5.3 系列、Doubao-Seedream-5.0-pro、Kimi-K3 (部分)， 限时 9.9 元起

产品介绍相关文档
火山引擎 最新活动
全面开放
Doubao-Seedance-2.5全新模型升级

模型再升级,30秒超长叙事, 模态参考扩容

HOT
方舟Codingplan

模型自由，工具不限，最新支持 Deepseek-V4 系列、GLM-5.3 系列

HOT
方舟Agent plan

超全模态模型 × Harness 升级，最新支持 Deepseek-V4.1-Flash、GLM-5.3 系列

HOT
新用户特惠专场

大模型19元起，Al应用9.9元畅享，新人首购爆款尽享优惠

最近更新时间：2026.08.25 15:24:21