oidldapd01s Log Shows "Hard error on read, OS error =..." (Doc ID 451896.1)

Last updated on DECEMBER 13, 2023

Applies to:

Symptoms

• oidldapd01s log shows this error at frequent, regular, intervals. The error number varies by platform:

  For OID server on HP:
  2007/06/05:10:41:12 * ServerDispatcher :1 * sgslufread: Hard error on read, OS error = 232
  
  For OID server on Solaris:
  2007/06/13:08:36:26 * ServerDispatcher :1 * sgslufread: Hard error on read, OS error = 131
  
  For OID server on Linux:
  2008/07/01:02:41:17 * ServerDispatcher :1 * sgslufread: Hard error on read, OS error = 104
  
  For OID server on Windows:
  2008/07/01:02:41:17 * ServerDispatcher :1 * sgslufread: Hard error on read, OS error = 10054
  
  For OID server on IBM AIX:
  * ServerDispatcher :5 * sgslufread: Hard error on read, OS error = 73

  
  To find these and other unix/OS error codes and corresponding messages:
  

  On Solaris and HP:

  cd /usr/include/sys
  grep <error number or text> errno.h

  On Linux:

  cd /usr/include/asm
  grep <error number or text> errno.h

• Wireshark/tcpdump shows many TCP sockets being started against the LDAP port and then
  dropped before any actual request is sent. This would explain the error messages in the OID
  logs. A client starts to connect then drops the connection. For example:

  Time           Source           Destination     Pro   Info
  14.011361 <SOURCE IP> <DESTINATION IP> TCP 2957 > ldap [SYN] Seq=0 Len=0 ...
  14.011384 <DESTINATION IP> <SOURCE IP> TCP ldap > 2957 {SYN, ACK] Seq=0 ...
  14.011880 <SOURCE IP> <DESTINATION IP> TCP 2957 > ldap [ACK] Se1=1 Ack=1 ...
  14.044881 <SOURCE IP> <DESTINATION IP> TCP 2957 > ldap [RST, ACK] Seq=1 Ack=1 ...

  This shows the LBR initiating, the OID server responding, and LBR replying twice.
  
  

• A telnet to the OID port returns no error, and results in much the same packets and the same error in the oidldapd log:

  telnet <OID HOSTNAME> <OID_port>
  Trying 10.10.10.30...
  Connected to testsrv.
  Escape character is '^]'. Connection closed by foreign host.

• This error was not present in 10.1.2

Changes

Cause

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