9.6 IS is down and not coming up

Thank you Holger.
I will check the size issue and update the result.
Actually we have a clustered node in this case. The available space in the other server is quite good.

/dev/mapper/appvg-webMethodslv
128G 58G 64G 48% /opt/webMethods

And the JDBC pools in both the servers are connecting to the same DB with same schema.

The other server is also down, and when i try to bring it up, am getting the below error:

2018-11-02 11:34:48 CET [ISS.0025.0001C] Integration Server 9.6.0.0 Build 294
2018-11-02 11:34:48 CET [ISS.0025.0006I] License Manager started
2018-11-02 11:34:48 CET [ISS.0001.0008W] Publish / Subscribe Functionality disabled due to license restrictions.
2018-11-02 11:34:48 CET [ISS.0001.0008W] Adapter Runtime Functionality disabled due to license restrictions.
2018-11-02 11:34:48 CET [ISS.0001.0008W] Remote Invoke Functionality disabled due to license restrictions.
2018-11-02 11:34:48 CET [ISS.0001.0008W] Guaranteed Delivery Functionality disabled due to license restrictions.
2018-11-02 11:34:48 CET [ISS.0001.0008W] Distributed Cache Functionality disabled due to license restrictions.
2018-11-02 11:34:49 CET [ISS.0025.0050W] The JCE Unlimited Strength Jurisdiction Policy File was not found. Please install it.
2018-11-02 11:34:50 CET [ISS.0025.0041I] FIPS mode not initialized
2018-11-02 11:34:51 CET [BAS.0123.0001I] FSData full consistency check is being performed. Db:WmRepository4/RepoV4
2018-11-02 11:34:52 CET [ISS.0025.0017I] Repository Manager started
2018-11-02 11:34:54 CET [ISS.0096.0001C] JDBCConnectionManager: initialization failed for CentralUsers functional alias, check configuration.
2018-11-02 11:34:55 CET [ISS.0096.0001C] JDBCConnectionManager: initialization failed for ISInternal functional alias, check configuration
.
2018-11-02 11:34:59 CET [ISS.0025.0024I] JDBC Connection Manager started
2018-11-02 11:34:59 CET [ISS.0095.0015W] Database at URI java:webMethods/jdbc/ProcessAudit is not available.
2018-11-02 11:34:59 CET [ISS.0095.0018W] Cannot change destination of logger Process Logger to file system.
2018-11-02 11:34:59 CET [ISS.0095.0019W] Disabling the logger Process Logger.
2018-11-02 11:34:59 CET [ISS.0095.0015W] Database at URI java:webMethods/jdbc/ISCoreAudit is not available.
2018-11-02 11:34:59 CET [ISS.0095.0018W] Cannot change destination of logger Document Logger to file system.
2018-11-02 11:34:59 CET [ISS.0095.0019W] Disabling the logger Document Logger.
2018-11-02 11:35:00 CET [WmAuditingSC.main.5010E] Failed to open destination ‘ErrorDBDest’; reason ‘Failed to lookup DataSource for ‘java:webMethods/jdbc/ISCoreAudit’’
2018-11-02 11:35:00 CET [WmAuditingSC.main.5010E] Failed to open destination ‘ServiceDBDest’; reason ‘Failed to lookup DataSource for ‘java:webMethods/jdbc/ISCoreAudit’’
2018-11-02 11:35:00 CET [WmAuditingSC.main.5010E] Failed to open destination ‘CoreAuditDBDest’; reason ‘Failed to lookup DataSource for ‘java:webMethods/jdbc/ISCoreAudit’’
2018-11-02 11:35:00 CET [WmAuditingSC.main.5010E] Failed to open destination ‘mediatorTxnJdbc’; reason ‘Failed to lookup DataSource for ‘java:webMethods/jdbc/ISCoreAudit’’
2018-11-02 11:35:00 CET [WmAuditingSC.main.5010E] Failed to open destination ‘SessionDBDest’; reason ‘Failed to lookup DataSource for ‘java:webMethods/jdbc/ISCoreAudit’’
2018-11-02 11:35:00 CET [WmAuditingSC.main.5010E] Failed to open destination ‘ProcessAuditDBDest’; reason ‘Failed to lookup DataSource for ‘java:webMethods/jdbc/ProcessAudit’’
2018-11-02 11:35:00 CET [WmAuditingSC.queue.2019W] Worker thread for queue ‘ProcessAuditQueue’ started, but its target destination is not open
2018-11-02 11:35:00 CET [WmAuditingSC.queue.2019W] Worker thread for queue ‘Document Queue’ started, but its target destination is not open
2018-11-02 11:35:00 CET [ISS.0095.0014W] Audit Logging initialized with errors.
2018-11-02 11:35:00 CET [ISS.0014.0054C] Error occurred while initializing server: com.wm.util.coder.InvalidDatatypeException: [ISC.0076.9002] incorrect IDataXMLCoder file format: no element ‘IDataXMLCoder’ found at com.wm.util.coder.IDataXMLCoder.decode(IDataXMLCoder.java:315) at com.wm.util.coder.IDataXMLCoder.decode(IDataXMLCoder.java:295) at com.wm.util.coder.IDataCoder.readFromFile(IDataCoder.java:108) at com.wm.util.IDataRegistry.readFromFile(IDataRegistry.java:101) at com.wm.util.IDataRegistry.init(IDataRegistry.java:61) at com.wm.util.IDataRegistry.(IDataRegistry.java:43) at com.wm.util.IDataRegistry.(IDataRegistry.java:30) at com.wm.app.b2b.server.sftp.client.SFTPClientManager.(SFTPClientManager.java:102) at com.wm.app.b2b.server.sftp.client.SFTPClientManager.initialize(SFTPClientManager.java:72) at com.wm.app.b2b.server.Server.run(Server.java:388)

Regards
Jyoti