IpOfTheServer:serverPort/OAMCONSOLE not browsing

[zohwal]

Dear erman,
I hope you are doing well.
I am facing with an issue of oamconsole . while starting the oam manage server oamconsole not browsible however i shut down the manage sever then its normally browsing .
oam_admin status is activate


ERROR code

[2020-06-28T12:37:05.718+04:30] [AdminServer] [WARNING] [] [oracle.oam.agent-default] [tid: [ACTIVE].ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: <anonymous>] [ecid: b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018ce,0] [APP: oam_admin#11.1.2.0.0] OAM Server request failed: OpCode = 19 [GetSessionInfo], Returned Status = Major code: 71(SessionInvalid) Minor code: 2(NoCode)
[2020-06-28T12:37:05.718+04:30] [AdminServer] [WARNING] [OAMAGENT-00406] [oracle.oam.agent-default] [tid: [ACTIVE].ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: <anonymous>] [ecid: b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018ce,0] [APP: oam_admin#11.1.2.0.0] Invalid authentication token: AccessService INVALID_USER_SESSION
[2020-06-28T12:37:06.025+04:30] [AdminServer] [WARNING] [] [oracle.oam.agent-default] [tid: [ACTIVE].ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: <anonymous>] [ecid: b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018d1,0] [APP: oam_admin#11.1.2.0.0] OAM Server request failed: OpCode = 19 [GetSessionInfo], Returned Status = Major code: 71(SessionInvalid) Minor code: 2(NoCode)
[2020-06-28T12:37:06.026+04:30] [AdminServer] [WARNING] [OAMAGENT-00406] [oracle.oam.agent-default] [tid: [ACTIVE].ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: <anonymous>] [ecid: b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018d1,0] [APP: oam_admin#11.1.2.0.0] Invalid authentication token: AccessService INVALID_USER_SESSION
[2020-06-28T12:37:06.198+04:30] [AdminServer] [WARNING] [] [oracle.oam.agent-default] [tid: [ACTIVE].ExecuteThread: '6' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: <anonymous>] [ecid: b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018d3,0] [APP: oam_admin#11.1.2.0.0] OAM Server request failed: OpCode = 19 [GetSessionInfo], Returned Status = Major code: 71(SessionInvalid) Minor code: 2(NoCode)
[2020-06-28T12:37:06.198+04:30] [AdminServer] [WARNING] [OAMAGENT-00406] [oracle.oam.agent-default] [tid: [ACTIVE].ExecuteThread: '6' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: <anonymous>] [ecid: b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018d3,0] [APP: oam_admin#11.1.2.0.0] Invalid authentication token: AccessService INVALID_USER_SESSION
[2020-06-28T12:37:06.433+04:30] [AdminServer] [WARNING] [] [oracle.oam.agent-default] [tid: [ACTIVE].ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: <anonymous>] [ecid: b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018d5,0] [APP: oam_admin#11.1.2.0.0] OAM Server request failed: OpCode = 19 [GetSessionInfo], Returned Status = Major code: 71(SessionInvalid) Minor code: 2(NoCode)
[2020-06-28T12:37:06.433+04:30] [AdminServer] [WARNING] [OAMAGENT-00406] [oracle.oam.agent-default] [tid: [ACTIVE].ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: <anonymous>] [ecid: b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018d5,0] [APP: oam_admin#11.1.2.0.0] Invalid authentication token: AccessService INVALID_USER_SESSION
[2020-06-28T12:39:03.587+04:30] [AdminServer] [WARNING] [] [oracle.adf.share.ADFContext] [tid: DmsThread-2] [userId: <WLS Kernel>] [ecid: b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000000dd,1:29179] [APP: oam_admin#11.1.2.0.0] Automatically initializing a DefaultContext for getCurrent.[[
Caller should ensure that a DefaultContext is proper for this use.
Memory leaks and/or unexpected behaviour may occur if the automatic initialization is performed improperly.
This message may be avoided by performing initADFContext before using getCurrent().
For more information please enable logging for oracle.adf.share.ADFContext at FINEST level.
]]
Invalid) Minor code: 2(NoCode) >
####<Jun 28, 2020 12:42:06 PM AFT> <Warning> <oracle.oam.agent-default> <OBDXUATSEC> <AdminServer> <[ACTIVE] ExecuteThread: '6' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018e2> <1593331926698> <OAMAGENT-00406> <Invalid authentication token: AccessService INVALID_USER_SESSION> 
####<Jun 28, 2020 12:42:06 PM AFT> <Warning> <oracle.oam.agent-default> <OBDXUATSEC> <AdminServer> <[ACTIVE] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018e4> <1593331926862> <BEA-000000> <OAM Server request failed: OpCode = 19 [GetSessionInfo], Returned Status = Major code: 71(SessionInvalid) Minor code: 2(NoCode) > 
####<Jun 28, 2020 12:42:06 PM AFT> <Warning> <oracle.oam.agent-default> <OBDXUATSEC> <AdminServer> <[ACTIVE] ExecuteThread: '5' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018e4> <1593331926863> <OAMAGENT-00406> <Invalid authentication token: AccessService INVALID_USER_SESSION> 
####<Jun 28, 2020 12:42:07 PM AFT> <Warning> <oracle.oam.agent-default> <OBDXUATSEC> <AdminServer> <[ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <b18c0af86523d82a:3545e7f6:172ebce97be:-8000-00000000000018e6> <1593331927253> <BEA-000000> <OAM Server request failed: OpCode = 19 [GetSessionInfo], Returned Status = Major code: 71(SessionInvalid) Minor code: 2(NoCode) > 

[ErmanArslansOracleBlog]

Do you have a custom plugin?
If so, please follow -> OAM Custom Plugin Activation Fails (Doc ID 2421105.1)

Also, take a look at this  one ->
OAM 11g: Intermittently Unable to Login to OAM Console When Using OAM Clusters (Doc ID 1397363.1)

If these are not like your case and the symptoms are not similar to your, please send me the full log of the managed server + the oam log.