2843629 - ADM14000E DB2 is unable to open diagnostic log file

You notice that Db2 is no longer writing log entries to the db2diag.log file.

The following file sharing violation messages are being reported repeatedly in the db2<sid>.nfy notification log:

2019-01-23-12.00.53.428953 Instance:db2mcp Node:000
PID:58614(db2stmm (SID) 0) TID:3779061504 Appid:*LOCAL.DB2.180811174835
RAS/PD component pdDmpErrMsg Probe:20 Database:SID
ADM14000E DB2 is unable to open diagnostic log file
"/db2/SID/db2dump/db2diag.log". Run the command "db2diag -rc "0x870f0016"" to find out more.

The operating system log (Linux in this case) reports the following:

2019-01-23T11:59:04.380045-05:00 n01d08ldbp778 DB2[58614]:Open of log file "/db2/SID/db2dump/db2diag.log" failed with rc 0x870F0016#012
Instance name: db2mcp#012Node number: 0#012Process ID: 58614#012Process name:db2sysc 0#012EDU ID: 23311#012EDU name: db2agent (SID) 0#012
Thread ID: 140201762481920#012Database name: SID#012Probe number: 11#012Product Name: DB2 UDB#012Component Name: common communication#012Function Name: sqlcctcptest

DB2 (DB6) 10.5 Fixpacks 8 and 9 Unix platforms only.

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