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From: "Brooks, Kenneth S" <kenneth.s.brooks@chase.com>
To: HttpClient User Discussion <httpclient-users@hc.apache.org>
Date: Tue, 25 May 2010 13:06:46 -0400
Subject: java.lang.IllegalStateException: Connection already open
Thread-Topic: java.lang.IllegalStateException: Connection already open
Thread-Index: Acr8LKZwViIcfS8wSl6sXE4s2Ww5Fw==
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What would cause this:  java=2Elang=2EIllegalStateException: Connection alr=
eady open=0D=0A=0D=0ANever saw this when using httpclient 3=2Ex, recently u=
pgraded to 4=2E0=2E1 and saw this a few times while running performance tes=
ts=2E=0D=0A=0D=0AHere are all of the configurations used when constructing =
the client:=0D=0A        HttpParams httpParams =3D new BasicHttpParams();=
=0D=0A=0D=0A        HttpProtocolParams=2EsetVersion(httpParams, HttpVersion=
=2EHTTP_1_1);=0D=0A=0D=0A        ConnManagerParams=2EsetMaxTotalConnections=
(httpParams, ClientPropertyLocator=2EgetInstance()=2EgetIntProperty(ClientP=
ropertyLocator=2EHTTP_MAX_TOTAL_CONNECTIONS));=0D=0A        ConnManagerPara=
ms=2EsetMaxConnectionsPerRoute(httpParams, new ConnPerRouteBean(ClientPrope=
rtyLocator=2EgetInstance()=2EgetIntProperty(ClientPropertyLocator=2EHTTP_MA=
X_CONNECTIONS_PER_ROUTE)));=0D=0A=0D=0A        HttpConnectionParams=2EsetCo=
nnectionTimeout(httpParams, ClientPropertyLocator=2EgetInstance()=2EgetIntP=
roperty(ClientPropertyLocator=2EHTTP_CONNECTION_TIMEOUT));=0D=0A        Htt=
pConnectionParams=2EsetStaleCheckingEnabled(httpParams, ClientPropertyLocat=
or=2EgetInstance()=2EgetBooleanProperty(ClientPropertyLocator=2EHTTP_STALE_=
CONNECTION_CHECK_ENABLED));=0D=0A        HttpConnectionParams=2EsetSoTimeou=
t(httpParams, ClientPropertyLocator=2EgetInstance()=2EgetIntProperty(Client=
PropertyLocator=2EHTTP_SOCKET_TIMEOUT));=0D=0A        HttpConnectionParams=
=2EsetLinger(httpParams, ClientPropertyLocator=2EgetInstance()=2EgetIntProp=
erty(ClientPropertyLocator=2EHTTP_SO_LINGER));=0D=0A        HttpConnectionP=
arams=2EsetTcpNoDelay(httpParams, ClientPropertyLocator=2EgetInstance()=2Eg=
etBooleanProperty(ClientPropertyLocator=2EHTTP_TCP_NODELAY));=0D=0A=0D=0A  =
      SchemeRegistry schemeRegistry =3D new SchemeRegistry();=0D=0A        =
schemeRegistry=2Eregister(new Scheme("http", PlainSocketFactory=2EgetSocket=
Factory(), 80));=0D=0A=0D=0A        ClientConnectionManager clientConnectio=
nManager =3D new ThreadSafeClientConnManager(httpParams, schemeRegistry);=
=0D=0A=0D=0A        IdleConnectionMonitorThread idleConnectionMonitorThread=
 =3D new IdleConnectionMonitorThread(clientConnectionManager);=0D=0A       =
 idleConnectionMonitorThread=2EsetIdleConnectionTimeout(ClientPropertyLocat=
or=2EgetInstance()=2EgetIntProperty(ClientPropertyLocator=2EHTTP_IDLE_CONNE=
CTION_TIMEOUT));=0D=0A        idleConnectionMonitorThread=2EsetIdleConnecti=
onCheckInterval(ClientPropertyLocator=2EgetInstance()=2EgetIntProperty(Clie=
ntPropertyLocator=2EHTTP_IDLE_CONNECTION_CHECK_INTERVAL));=0D=0A        idl=
eConnectionMonitorThread=2Estart();=0D=0A=0D=0A        httpClient =3D new D=
efaultHttpClient(clientConnectionManager, httpParams);=0D=0A=0D=0A=0D=0A=0D=
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