Nullpointer exception found in Jira log

[Vidhya Mohan]

Hello,

I keep finding the below null pointer exception in Jira log. How can I know why this null pointer exception occurs? 

2021-06-17 13:13:18,841+0200 https-jsse-nio-8443-exec-8 ERROR xxx@xxx.com 793x5752730x6 1b6i6t1 195.238.24.42,10.61.92.21 /plugins/servlet/gadgets/makeRequest [o.a.c.c.C.[Catalina].[localhost].[/]] Unhandled exception occurred whilst decorating page

java.lang.NullPointerException

       at com.atlassian.gadgets.renderer.internal.http.HttpClientFetcher.addResponseToCacheIfSuccessful(HttpClientFetcher.java:81)

       at com.atlassian.gadgets.renderer.internal.http.HttpClientFetcher.performRequest(HttpClientFetcher.java:102)

       at com.atlassian.gadgets.renderer.internal.http.HttpClientFetcher.fetch(HttpClientFetcher.java:59)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetchFromServer(OAuthFetcher.java:805)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.sendOAuthMessage(OAuthFetcher.java:584)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetchRequestToken(OAuthFetcher.java:335)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.attemptFetch(OAuthFetcher.java:275)

       at com.atlassian.gadgets.renderer.internal.oauth.AtlassianOAuthFetcher.attemptFetch(AtlassianOAuthFetcher.java:66)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetchWithRetry(OAuthFetcher.java:231)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetchNoThrow(OAuthFetcher.java:189)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetch(OAuthFetcher.java:170)

       at org.apache.shindig.gadgets.http.ContentFetcherFactory.fetch(ContentFetcherFactory.java:55)

       at com.atlassian.gadgets.renderer.internal.http.TrustedAppContentFetcherFactory.fetch(TrustedAppContentFetcherFactory.java:42)

       at org.apache.shindig.gadgets.servlet.MakeRequestHandler.fetch(MakeRequestHandler.java:84)

       at org.apache.shindig.gadgets.servlet.MakeRequestServlet.doGet(MakeRequestServlet.java:55)

       at com.atlassian.gadgets.shindig.servlet.XsrfMakeRequestServlet.doGet(XsrfMakeRequestServlet.java:24)

       at org.apache.shindig.gadgets.servlet.MakeRequestServlet.doPost(MakeRequestServlet.java:65)

       at com.atlassian.gadgets.shindig.servlet.XsrfMakeRequestServlet.doPost(XsrfMakeRequestServlet.java:37)

       at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)

       at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

       at com.atlassian.plugin.servlet.DelegatingPluginServlet.service(DelegatingPluginServlet.java:37)

       at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

       at com.atlassian.plugin.servlet.ServletModuleContainerServlet.service(ServletModuleContainerServlet.java:46)

       at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

       ... 48 filtered

       at com.atlassian.jira.plugin.mobile.web.filter.MobileAppRequestFilter.doFilter(MobileAppRequestFilter.java:59)

       ... 4 filtered

       at com.atlassian.jira.plugin.mobile.login.MobileLoginSuccessFilter.doFilter(MobileLoginSuccessFilter.java:54)

       ... 3 filtered

       at com.atlassian.diagnostics.internal.platform.monitor.http.HttpRequestMonitoringFilter.doFilter(HttpRequestMonitoringFilter.java:55)

       ... 8 filtered

       at org.apache.shindig.auth.AuthenticationServletFilter.callChain(AuthenticationServletFilter.java:123)

       at org.apache.shindig.auth.AuthenticationServletFilter.doFilter(AuthenticationServletFilter.java:86)

       ... 3 filtered

       at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)

       ... 48 filtered

       at com.atlassian.troubleshooting.thready.filter.AbstractThreadNamingFilter.doFilter(AbstractThreadNamingFilter.java:46)

       ... 17 filtered

       at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:66)

       ... 1 filtered

       at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:64)

       ... 36 filtered

       at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)

       ... 10 filtered

       at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)

       ... 4 filtered

       at com.atlassian.troubleshooting.thready.filter.AbstractThreadNamingFilter.doFilter(AbstractThreadNamingFilter.java:46)

       ... 3 filtered

       at com.atlassian.web.servlet.plugin.LocationCleanerFilter.doFilter(LocationCleanerFilter.java:36)

       ... 29 filtered

       at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)

       ... 25 filtered

       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

       at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

       at java.lang.Thread.run(Thread.java:748)

2021-06-17 13:13:18,844+0200 https-jsse-nio-8443-exec-8 ERROR      [o.a.c.c.C.[.[localhost].[/].[servlet-module-container-servlet]] Servlet.service() for servlet [servlet-module-container-servlet] in context with path [] threw exception

java.lang.NullPointerException

       at com.atlassian.gadgets.renderer.internal.http.HttpClientFetcher.addResponseToCacheIfSuccessful(HttpClientFetcher.java:81)

       at com.atlassian.gadgets.renderer.internal.http.HttpClientFetcher.performRequest(HttpClientFetcher.java:102)

       at com.atlassian.gadgets.renderer.internal.http.HttpClientFetcher.fetch(HttpClientFetcher.java:59)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetchFromServer(OAuthFetcher.java:805)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.sendOAuthMessage(OAuthFetcher.java:584)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetchRequestToken(OAuthFetcher.java:335)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.attemptFetch(OAuthFetcher.java:275)

       at com.atlassian.gadgets.renderer.internal.oauth.AtlassianOAuthFetcher.attemptFetch(AtlassianOAuthFetcher.java:66)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetchWithRetry(OAuthFetcher.java:231)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetchNoThrow(OAuthFetcher.java:189)

       at org.apache.shindig.gadgets.oauth.OAuthFetcher.fetch(OAuthFetcher.java:170)

       at org.apache.shindig.gadgets.http.ContentFetcherFactory.fetch(ContentFetcherFactory.java:55)

       at com.atlassian.gadgets.renderer.internal.http.TrustedAppContentFetcherFactory.fetch(TrustedAppContentFetcherFactory.java:42)

       at org.apache.shindig.gadgets.servlet.MakeRequestHandler.fetch(MakeRequestHandler.java:84)

       at org.apache.shindig.gadgets.servlet.MakeRequestServlet.doGet(MakeRequestServlet.java:55)

       at com.atlassian.gadgets.shindig.servlet.XsrfMakeRequestServlet.doGet(XsrfMakeRequestServlet.java:24)

       at org.apache.shindig.gadgets.servlet.MakeRequestServlet.doPost(MakeRequestServlet.java:65)

       at com.atlassian.gadgets.shindig.servlet.XsrfMakeRequestServlet.doPost(XsrfMakeRequestServlet.java:37)

       at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)

       at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

       at com.atlassian.plugin.servlet.DelegatingPluginServlet.service(DelegatingPluginServlet.java:37)

       at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

       at com.atlassian.plugin.servlet.ServletModuleContainerServlet.service(ServletModuleContainerServlet.java:46)

       at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

       ... 48 filtered

       at com.atlassian.jira.plugin.mobile.web.filter.MobileAppRequestFilter.doFilter(MobileAppRequestFilter.java:59)

       ... 4 filtered

       at com.atlassian.jira.plugin.mobile.login.MobileLoginSuccessFilter.doFilter(MobileLoginSuccessFilter.java:54)

       ... 3 filtered

       at com.atlassian.diagnostics.internal.platform.monitor.http.HttpRequestMonitoringFilter.doFilter(HttpRequestMonitoringFilter.java:55)

       ... 8 filtered

       at org.apache.shindig.auth.AuthenticationServletFilter.callChain(AuthenticationServletFilter.java:123)

       at org.apache.shindig.auth.AuthenticationServletFilter.doFilter(AuthenticationServletFilter.java:86)

       ... 3 filtered

       at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)

       ... 48 filtered

       at com.atlassian.troubleshooting.thready.filter.AbstractThreadNamingFilter.doFilter(AbstractThreadNamingFilter.java:46)

       ... 17 filtered

       at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:66)

       ... 1 filtered

       at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:64)

       ... 36 filtered

       at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)

       ... 10 filtered

       at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)

       ... 4 filtered

       at com.atlassian.troubleshooting.thready.filter.AbstractThreadNamingFilter.doFilter(AbstractThreadNamingFilter.java:46)

       ... 3 filtered

       at com.atlassian.web.servlet.plugin.LocationCleanerFilter.doFilter(LocationCleanerFilter.java:36)

       ... 29 filtered

       at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)

       ... 25 filtered

       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

       at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

       at java.lang.Thread.run(Thread.java:748)