Error while try to publish API WSO2 2.6.0 - wso2

Question

I faced with following exception in wso2 api manager 2.6.0, when changing api lifecycle state to Publish.
TID: [-1234] [] [2021-10-06 15:24:44,413] ERROR {org.wso2.carbon.governance.registry.extensions.aspects.DefaultLifeCycle} - org.wso2.carbon.registry.core.exceptions.RegistryException: Execution failed for action : Publish Embedded error : FaultGatewaysException:{"PUBLISHED":{"Production and Sandbox":"Error while publishing API to the Gateway. Error while publishing API to the Gateway. com.ctc.wstx.exc.WstxEOFException: Unexpected EOF; was expecting a close tag for element \n at [row,col {unknown-source}]: [88,0]"},"UNPUBLISHED":{}} {org.wso2.carbon.governance.registry.extensions.aspects.DefaultLifeCycle}
TID: [-1234] [] [2021-10-06 15:24:44,479] ERROR {org.wso2.carbon.governance.api.common.dataobjects.GovernanceArtifactImpl} - Invoking lifecycle action "Publish" failed. Execution failed for action : Publish Embedded error : FaultGatewaysException:{"PUBLISHED":{"Production and Sandbox":"Error while publishing API to the Gateway. Error while publishing API to the Gateway. com.ctc.wstx.exc.WstxEOFException: Unexpected EOF; was expecting a close tag for element \n at [row,col {unknown-source}]: [88,0]"},"UNPUBLISHED":{}} {org.wso2.carbon.governance.api.common.dataobjects.GovernanceArtifactImpl}
org.wso2.carbon.registry.core.exceptions.RegistryException: Execution failed for action : Publish Embedded error : FaultGatewaysException:{"PUBLISHED":{"Production and Sandbox":"Error while publishing API to the Gateway. Error while publishing API to the Gateway. com.ctc.wstx.exc.WstxEOFException: Unexpected EOF; was expecting a close tag for element \n at [row,col {unknown-source}]: [88,0]"},"UNPUBLISHED":{}}
at org.wso2.carbon.governance.registry.extensions.aspects.DefaultLifeCycle.invoke(DefaultLifeCycle.java:482)
at org.wso2.carbon.governance.registry.eventing.handlers.GovernanceEventingHandler.invokeAspect(GovernanceEventingHandler.java:344)
at org.wso2.carbon.registry.core.jdbc.handlers.HandlerManager.invokeAspect(HandlerManager.java:2792)
at org.wso2.carbon.registry.core.jdbc.handlers.HandlerLifecycleManager.invokeAspect(HandlerLifecycleManager.java:518)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.invokeAspect(EmbeddedRegistry.java:2607)
at org.wso2.carbon.registry.core.caching.CacheBackedRegistry.invokeAspect(CacheBackedRegistry.java:510)
at org.wso2.carbon.registry.core.session.UserRegistry.invokeAspect(UserRegistry.java:1952)
at org.wso2.carbon.governance.api.common.dataobjects.GovernanceArtifactImpl.invokeAction(GovernanceArtifactImpl.java:829)
at org.wso2.carbon.governance.api.common.dataobjects.GovernanceArtifactImpl.invokeAction(GovernanceArtifactImpl.java:808)
at org.wso2.carbon.apimgt.impl.APIProviderImpl.changeLifeCycleStatus_aroundBody198(APIProviderImpl.java:4321)
at org.wso2.carbon.apimgt.impl.APIProviderImpl.changeLifeCycleStatus(APIProviderImpl.java:4249)
at org.wso2.carbon.apimgt.impl.UserAwareAPIProvider.changeLifeCycleStatus_aroundBody70(UserAwareAPIProvider.java:310)
at org.wso2.carbon.apimgt.impl.UserAwareAPIProvider.changeLifeCycleStatus(UserAwareAPIProvider.java:306)
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.mozilla.javascript.MemberBox.invoke(MemberBox.java:126)
at org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java:225)
at org.mozilla.javascript.optimizer.OptRuntime.call2(OptRuntime.java:42)
at org.jaggeryjs.rhino.publisher.modules.api.c3._c_anonymous_1(/publisher/modules/api/life-cycles.jag:13)
at org.jaggeryjs.rhino.publisher.modules.api.c3.call(/publisher/modules/api/life-cycles.jag)
at org.mozilla.javascript.ScriptRuntime.applyOrCall(ScriptRuntime.java:2430)
at org.mozilla.javascript.BaseFunction.execIdCall(BaseFunction.java:269)
at org.mozilla.javascript.IdFunctionObject.call(IdFunctionObject.java:97)
at org.mozilla.javascript.optimizer.OptRuntime.call2(OptRuntime.java:42)
at org.jaggeryjs.rhino.publisher.modules.api.c0._c_anonymous_14(/publisher/modules/api/module.jag:50)
at org.jaggeryjs.rhino.publisher.modules.api.c0.call(/publisher/modules/api/module.jag)
at org.mozilla.javascript.optimizer.OptRuntime.call1(OptRuntime.java:32)
at org.jaggeryjs.rhino.publisher.site.blocks.life_cycles.ajax.c0._c_anonymous_1(/publisher/site/blocks/life-cycles/ajax/life-cycles.jag:64)
at org.jaggeryjs.rhino.publisher.site.blocks.life_cycles.ajax.c0.call(/publisher/site/blocks/life-cycles/ajax/life-cycles.jag)
at org.mozilla.javascript.optimizer.OptRuntime.call0(OptRuntime.java:23)
at org.jaggeryjs.rhino.publisher.site.blocks.life_cycles.ajax.c0._c_script_0(/publisher/site/blocks/life-cycles/ajax/life-cycles.jag:5)
at org.jaggeryjs.rhino.publisher.site.blocks.life_cycles.ajax.c0.call(/publisher/site/blocks/life-cycles/ajax/life-cycles.jag)
at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:394)
at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3091)
at org.jaggeryjs.rhino.publisher.site.blocks.life_cycles.ajax.c0.call(/publisher/site/blocks/life-cycles/ajax/life-cycles.jag)
at org.jaggeryjs.rhino.publisher.site.blocks.life_cycles.ajax.c0.exec(/publisher/site/blocks/life-cycles/ajax/life-cycles.jag)
at org.jaggeryjs.scriptengine.engine.RhinoEngine.execScript(RhinoEngine.java:567)
at org.jaggeryjs.scriptengine.engine.RhinoEngine.exec(RhinoEngine.java:273)
at org.jaggeryjs.jaggery.core.manager.WebAppManager.exec(WebAppManager.java:588)
at org.jaggeryjs.jaggery.core.manager.WebAppManager.execute(WebAppManager.java:508)
at org.jaggeryjs.jaggery.core.JaggeryServlet.doPost(JaggeryServlet.java:29)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:743)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:485)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:377)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:337)
at org.jaggeryjs.jaggery.core.JaggeryFilter.doFilter(JaggeryFilter.java:21)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.wso2.carbon.ui.filters.cache.ContentTypeBasedCachePreventionFilter.doFilter(ContentTypeBasedCachePreventionFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.filters.HttpHeaderSecurityFilter.doFilter(HttpHeaderSecurityFilter.java:124)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:498)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.wso2.carbon.tomcat.ext.valves.RequestCorrelationIdValve.invoke(RequestCorrelationIdValve.java:114)
at org.wso2.carbon.identity.context.rewrite.valve.TenantContextRewriteValve.invoke(TenantContextRewriteValve.java:80)
at org.wso2.carbon.identity.authz.valve.AuthorizationValve.invoke(AuthorizationValve.java:91)
at org.wso2.carbon.identity.auth.valve.AuthenticationValve.invoke(AuthenticationValve.java:65)
at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:99)
at org.wso2.carbon.tomcat.ext.valves.CarbonTomcatValve$1.invoke(CarbonTomcatValve.java:47)
at org.wso2.carbon.webapp.mgt.TenantLazyLoaderValve.invoke(TenantLazyLoaderValve.java:57)
at org.wso2.carbon.event.receiver.core.internal.tenantmgt.TenantLazyLoaderValve.invoke(TenantLazyLoaderValve.java:48)
at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:47)
at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:62)
at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:159)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1775)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1734)
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)

Answer 1

The problem was a open tag at <APIM_HOME>/repository/resources/api_templates/velocity_template.xml
</handlers>
/api>