APAR status
Closed as program error.
Error description
Error Message: A SIGSEGV is received when user attempts blocking socket operations like read, connect, accept ... . Stack Trace: _mutex_lock(??, ??, ??) at 0x9000000008da714 endOp(fd = 570, self = 0x000000012057eb38), line 274 in "linux_close.c" NET_Read(s = 570, buf = 0x000000012057ebf0, len = 32767), line 407 in "linux_close.c" Java_java_net_SocketInputStream_socketRead0(env = 0x0000000031ea9000, this = 0x000000011e4de500, fdObj = 0x000000011e4de4c0, data = 0x000000011e4de4f8, off = 0, len = 32767, timeout = 0), line 113 in "SocketInputStream.c" . . . . Problem occurs very intermittently.
Local fix
Problem summary
The crash occurred due to a narrow timing window between two threads when the fd table is expanded dynamically.
Problem conclusion
The JDK has been updated to allocate the maximum fd table during initialization and thereby avoiding the need to expand the fdtable dynamically.
Temporary fix
Comments
APAR Information
APAR number
IV96905
Reported component name
JAVA CLASS LIBS
Reported component ID
620700130
Reported release
600
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-06-05
Closed date
2017-10-01
Last modified date
2017-10-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
JAVA CLASS LIBS
Fixed component ID
620700130
Applicable component levels
R600 PSY
UP
R700 PSY
UP
R800 PSY
UP
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Document Information
Modified date:
01 October 2017