解决FontConfiguration.getVersion报空指针异常的问题

FontConfiguration.getVersion报空指针异常

程序中使用到了图形验证码的功能，本地测试没问题，但是在服务器上就会报异常。

服务器中缺少FontConfig，是因为服务器用的是OpenJDK， 所以需要手动安装。

而本地用的则是正式JDK1.8,所以没有问题。

安装命令：

yum install fontconfig

JDK引发的bug(sun.awt.FontConfiguration.getVersion NullPointerException)

背景阐述

项目开发中有个数据导出的功能，采用的是异步队列来处理的。

开发使用的jdk为

本地测试完全没有问题，部署到线上，一直会报下面日志的错误信息。

2020-02-11 07:29:40.575 - INFO 1 ---
                [nio-8080-exec-6] c.c.t.service.impl.TemplateServiceImpl   : >>>开始向【导出数据队列】投递消息<<<
2020-02-11 07:29:40.592 - INFO 1 ---
                [nio-8080-exec-6] c.c.t.service.impl.TemplateServiceImpl   : >>>向【导出数据队列】投递消息完成<<<
2020-02-11 07:29:40.619 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>成功接收导出数据的消息，消息参数为：{"formId":1219112740443000874,"process":{"creator":1189805389533810109,"deleted":false,"description":"开始处理","editor":1189805389533810109,"id":1227132577916260352,"state":"处理中","tenantId":1197018942024060928},"grantId":1189805389533810109,"processId":1227132577916260352,"tenantId":1197018942024060928,"dataIds":"[\"1224868133840490496\"]"}<<<<<
2020-02-11 07:29:40.619 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>开始解析参数<<<<<
2020-02-11 07:29:40.620 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>解析参数结束<<<<<
2020-02-11 07:29:44.439 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>成功接收导出数据的消息，消息参数为：{"formId":1219112740443000874,"process":{"creator":1189805389533810109,"deleted":false,"description":"开始处理","editor":1189805389533810109,"id":1227132577916260352,"state":"处理中","tenantId":1197018942024060928},"grantId":1189805389533810109,"processId":1227132577916260352,"tenantId":1197018942024060928,"dataIds":"[\"1224868133840490496\"]"}<<<<<
2020-02-11 07:29:44.440 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>开始解析参数<<<<<
2020-02-11 07:29:44.441 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>解析参数结束<<<<<
2020-02-11 07:29:47.553 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>成功接收导出数据的消息，消息参数为：{"formId":1219112740443000874,"process":{"creator":1189805389533810109,"deleted":false,"description":"开始处理","editor":1189805389533810109,"id":1227132577916260352,"state":"处理中","tenantId":1197018942024060928},"grantId":1189805389533810109,"processId":1227132577916260352,"tenantId":1197018942024060928,"dataIds":"[\"1224868133840490496\"]"}<<<<<
2020-02-11 07:29:47.554 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>开始解析参数<<<<<
2020-02-11 07:29:47.554 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>解析参数结束<<<<<
2020-02-11 07:29:50.677 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>成功接收导出数据的消息，消息参数为：{"formId":1219112740443000874,"process":{"creator":1189805389533810109,"deleted":false,"description":"开始处理","editor":1189805389533810109,"id":1227132577916260352,"state":"处理中","tenantId":1197018942024060928},"grantId":1189805389533810109,"processId":1227132577916260352,"tenantId":1197018942024060928,"dataIds":"[\"1224868133840490496\"]"}<<<<<
2020-02-11 07:29:50.678 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>开始解析参数<<<<<
2020-02-11 07:29:50.678 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>解析参数结束<<<<<
2020-02-11 07:29:53.780 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>成功接收导出数据的消息，消息参数为：{"formId":1219112740443000874,"process":{"creator":1189805389533810109,"deleted":false,"description":"开始处理","editor":1189805389533810109,"id":1227132577916260352,"state":"处理中","tenantId":1197018942024060928},"grantId":1189805389533810109,"processId":1227132577916260352,"tenantId":1197018942024060928,"dataIds":"[\"1224868133840490496\"]"}<<<<<
2020-02-11 07:29:53.780 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>开始解析参数<<<<<
2020-02-11 07:29:53.780 - INFO 1 ---
                [cTaskExecutor-1] c.c.t.rabbitmq.ExportDataReceiver        : >>>>>解析参数结束<<<<<
2020-02-11 07:29:53.965 - WARN 1 ---
                [cTaskExecutor-1] o.s.a.r.r.RejectAndDontRequeueRecoverer  : Retries exhausted for message (Body:'[B@7dedff15(byte[753])' MessageProperties [headers={}, contentType=application/x-java-serialized-object, contentLength=0, receivedDeliveryMode=PERSISTENT, priority=0, redelivered=false, receivedExchange=template_exchange, receivedRoutingKey=topic.template.exportData, deliveryTag=1, consumerTag=amq.ctag-80yarAv96_cA3nDTsNz8Hw, consumerQueue=template_exportData])
org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException: Listener method 'public void cn.cncommdata.template.rabbitmq.ExportDataReceiver.process(com.alibaba.fastjson.JSONObject)' threw exception
    at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:196)
    at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.onMessage(MessagingMessageListenerAdapter.java:126)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:1414)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.actualInvokeListener(AbstractMessageListenerContainer.java:1337)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:197)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
    at org.springframework.retry.interceptor.RetryOperationsInterceptor$1.doWithRetry(RetryOperationsInterceptor.java:91)
    at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:287)
    at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:180)
    at org.springframework.retry.interceptor.RetryOperationsInterceptor.invoke(RetryOperationsInterceptor.java:115)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
    at org.springframework.amqp.rabbit.listener.$Proxy156.invokeListener(Unknown Source)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:1324)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:1303)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:817)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:801)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$700(SimpleMessageListenerContainer.java:77)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1042)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException: null
    at sun.awt.FontConfiguration.getVersion(FontConfiguration.java:1264)
    at sun.awt.FontConfiguration.readFontConfigFile(FontConfiguration.java:219)
    at sun.awt.FontConfiguration.init(FontConfiguration.java:107)
    at sun.awt.X11FontManager.createFontConfiguration(X11FontManager.java:774)
    at sun.font.SunFontManager$2.run(SunFontManager.java:431)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.font.SunFontManager.<init>(SunFontManager.java:376)
    at sun.awt.FcFontManager.<init>(FcFontManager.java:35)
    at sun.awt.X11FontManager.<init>(X11FontManager.java:57)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at java.lang.Class.newInstance(Class.java:442)
    at sun.font.FontManagerFactory$1.run(FontManagerFactory.java:83)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.font.FontManagerFactory.getInstance(FontManagerFactory.java:74)
    at java.awt.Font.getFont2D(Font.java:491)
    at java.awt.Font.canDisplayUpTo(Font.java:2060)
    at java.awt.font.TextLayout.singleFont(TextLayout.java:470)
    at java.awt.font.TextLayout.<init>(TextLayout.java:531)
    at org.apache.poi.ss.util.SheetUtil.getDefaultCharWidth(SheetUtil.java:275)
    at org.apache.poi.xssf.streaming.AutoSizeColumnTracker.<init>(AutoSizeColumnTracker.java:117)
    at org.apache.poi.xssf.streaming.SXSSFSheet.<init>(SXSSFSheet.java:82)
    at org.apache.poi.xssf.streaming.SXSSFWorkbook.createAndRegisterSXSSFSheet(SXSSFWorkbook.java:658)
    at org.apache.poi.xssf.streaming.SXSSFWorkbook.createSheet(SXSSFWorkbook.java:679)
    at org.apache.poi.xssf.streaming.SXSSFWorkbook.createSheet(SXSSFWorkbook.java:90)
    at com.alibaba.excel.util.WorkBookUtil.createSheet(WorkBookUtil.java:51)
    at com.alibaba.excel.context.WriteContext.currentSheet(WriteContext.java:112)
    at com.alibaba.excel.write.ExcelBuilderImpl.addContent(ExcelBuilderImpl.java:69)
    at com.alibaba.excel.ExcelWriter.write1(ExcelWriter.java:106)
    at cn.cncommdata.template.utils.HeaderUtil.uploadWithData(HeaderUtil.java:311)
    at cn.cncommdata.template.rabbitmq.ExportDataReceiver.handler(ExportDataReceiver.java:131)
    at cn.cncommdata.template.rabbitmq.ExportDataReceiver.process(ExportDataReceiver.java:90)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:181)
    at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:114)
    at org.springframework.amqp.rabbit.listener.adapter.DelegatingInvocableHandler.invoke(DelegatingInvocableHandler.java:128)
    at org.springframework.amqp.rabbit.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:61)
    at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:188)
    ... 24 common frames omitted
2020-02-11 07:29:53.966 - WARN 1 ---
                [cTaskExecutor-1] s.a.r.l.ConditionalRejectingErrorHandler : Execution of Rabbit message listener failed.

问题排查

经过测试沟通发现，项目部署人员使用的jdk是openjdk，导致报上面的问题。

解决方案

将openjdk换为sunjdk。

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。