Aloha,

While using the json API we are seeing frequently such errors. These are read 
requests, which is why I am a bit confused about the “WRITER” in the stack 
trace but I guess the issue is that "/server/joiz_ch/jcr:root/.0.json” is an 
invalid URL?

2014-04-03 12:28:06.964 ERROR [2115513477@qtp-221739023-131] Slf4jLog.java:87 
/server/joiz_ch/jcr:root/.0.json
java.lang.IllegalStateException: WRITER
        at org.mortbay.jetty.Response.getOutputStream(Response.java:594) 
~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.WebdavResponseImpl.sendXmlResponse(WebdavResponseImpl.java:151)
 ~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.WebdavResponseImpl.sendError(WebdavResponseImpl.java:95)
 ~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:299)
 ~[jackrabbit.jar:na]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.Server.handle(Server.java:326) [jackrabbit.jar:na]
        at 
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938)
 [jackrabbit.jar:na]
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) 
[jackrabbit.jar:na]
        at 
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 
[jackrabbit.jar:na]
2014-04-03 12:28:10.649 ERROR [124001894@qtp-221739023-146] Slf4jLog.java:87 
/server/joiz_ch/jcr:root/.0.json
java.lang.IllegalStateException: WRITER
        at org.mortbay.jetty.Response.getOutputStream(Response.java:594) 
~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.WebdavResponseImpl.sendXmlResponse(WebdavResponseImpl.java:151)
 ~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.WebdavResponseImpl.sendError(WebdavResponseImpl.java:95)
 ~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:299)
 ~[jackrabbit.jar:na]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.Server.handle(Server.java:326) [jackrabbit.jar:na]
        at 
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938)
 [jackrabbit.jar:na]
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) 
[jackrabbit.jar:na]
        at 
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 
[jackrabbit.jar:na]
2014-04-03 12:56:10.644 ERROR [952066274@qtp-221739023-157] Slf4jLog.java:87 
/server/joiz_ch/jcr:root/.0.json
java.lang.IllegalStateException: WRITER
        at org.mortbay.jetty.Response.getOutputStream(Response.java:594) 
~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.WebdavResponseImpl.sendXmlResponse(WebdavResponseImpl.java:151)
 ~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.WebdavResponseImpl.sendError(WebdavResponseImpl.java:95)
 ~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:299)
 ~[jackrabbit.jar:na]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.Server.handle(Server.java:326) [jackrabbit.jar:na]
        at 
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938)
 [jackrabbit.jar:na]
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) 
[jackrabbit.jar:na]
        at 
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 
[jackrabbit.jar:na]
2014-04-03 12:56:12.011 ERROR [1440433128@qtp-221739023-163] Slf4jLog.java:87 
/server/joiz_ch/jcr:root/.0.json
java.lang.IllegalStateException: WRITER
        at org.mortbay.jetty.Response.getOutputStream(Response.java:594) 
~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.WebdavResponseImpl.sendXmlResponse(WebdavResponseImpl.java:151)
 ~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.WebdavResponseImpl.sendError(WebdavResponseImpl.java:95)
 ~[jackrabbit.jar:na]
        at 
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:299)
 ~[jackrabbit.jar:na]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390) 
~[jackrabbit.jar:na]
        at 
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.Server.handle(Server.java:326) [jackrabbit.jar:na]
        at 
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938)
 [jackrabbit.jar:na]
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) 
[jackrabbit.jar:na]
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
[jackrabbit.jar:na]
        at 
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) 
[jackrabbit.jar:na]
        at 
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 
[jackrabbit.jar:na]

regards,
Lukas Kahwe Smith
[email protected]



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