Dear Team,

A critical issues observed at our side.

MongoTimeoutException is occurring even when DB is running!!

we observed that MOngoServer didnt receive any metadata from the client-172.29.105.17.

Note: Both Client and MOngoServer are running on same Machine

Detailed Scenario is described below 

As observed from the  MongoDB  logs 

on 1st may 2018

2018-05-01T16:26:25.089-0400 I STORAGE [initandlisten] Service running
2018-05-01T16:26:25.089-0400 I NETWORK [thread1] waiting for connections on port 8090
{{2018-05-01T16:26:29.642-0400 I NETWORK [conn1] received client metadata from 172.29.105.17:64758 conn1: { driver:

Unknown macro: { name}

, os: { type: "Windows", name: "Windows Server 2012 R2", architecture: "x86", version: "6.3" }, platform: "Java/Oracle Corporation/1.8.0_144-b01" }}}
{{2018-05-01T16:26:29.854-0400 I NETWORK [conn2] received client metadata from 172.29.105.17:64759 conn2: { driver:

Unknown macro: { name}

, os: { type: "Windows", name: "Windows Server 2012 R2", architecture: "x86", version: "6.3" }, platform: "Java/Oracle Corporation/1.8.0_144-b01" }}}

on 12th may 2018

2018-05-12T17:24:33.148-0400 I CONTROL [main] Trying to start Windows service 'SRDMDbServer8090'
2018-05-12T17:24:33.224-0400 I CONTROL [initandlisten] MongoDB starting : pid=1404 port=8090 dbpath=C:\SRDM\SRDM2.5.0.11308.17\SRDM\Svr\DBService\bin64\..\data\db 64-bit host=WIN-OHPM52MOHG1
2018-05-12T17:24:45.446-0400 I STORAGE [initandlisten] Service running
2018-05-12T17:24:45.464-0400 I NETWORK [thread1] waiting for connections on port 8090

 

So, between  1st may 2018 & 12th may 2018 the difference we observed was server did'nt receive metadata from client .

hence when CLient initiate any DB Operations MOngoDB Timeout exceptions is occured with 

com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting for a server that matches ReadPreferenceServerSelector{readPreference=primary}. Client view of cluster state is {type=UNKNOWN, servers=[{address=172.29.105.17:8090, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by \{java.net.SocketException: Network is unreachable: connect}}]

Please let us know Why DB Operations is not successful in above said scenario??

Thanks & Regards

Sandeep KS