hpiThreadHardSuspend??

[C B]

We are having threads locking up in hpiThreadHardSuspend. What does
hpiThreadHardSuspend mean?

java version "1.4.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1)
Classic VM (build 1.4.1, J2RE 1.4.1 IBM build cxia321411-20030930 (JIT
enabled: jitc))

3XMTHREADINFO "athread" (TID:0x404908A8, sys_thread_t:0x830EE680,
state:R, native ID:0x3A4
011) prio=1
NULL
3HPREGISTERS Register Values
NULL ---------------
3HPREGVALUES EAX : 00000101, EBX : 830EE970, ECX : 00000000
3HPREGVALUES EDX : 830EE680, ESI : 830EEA34, EDI : 839DEE54
3HPREGVALUES EBP : 839DEE5C, ESP : 839DED54, EIP : 403FF9F0
3HPREGVALUES EFLAGS : 00000282
NULL
3HPNATIVESTACK Native Stack of "athread" PID 30453
NULL -------------------------
3HPSTACKLINE _hpiThreadHardSuspend at 403FF9F0 in libhpi.so
3HPSTACKLINE ?? at 403F2FDB in libhpi.so
3HPSTACKLINE ?? at 403F31E0 in libhpi.so
3HPSTACKLINE ?? at 40029C1F in libpthread.so.0
3HPSTACKLINE ?? at 400AEF90 in libc.so.6