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JVM crash on calling the JNI api

Hi all,
    I need to get the values of the attributes passed in the SAML assertion
in response to an Auth request, in my servlet application. For this I've
written a servlet filter which intercepts all requests, and gets the
ZXIDSES cookie (already set by mod_auth_saml), and make a native call to
fed_mgmt like

zxidjni.fed_mgmt("PATH=/var/zxid/", sessionId, 0x54);

But when this call is made the JVM crashes.

If someone can throw some light on this, it will be helpful.

My environment :

libzxidjni.so (compiled on Ubuntu 64 bit from version 1.16 zxid)

openjdk-6 (64-bit)

The relevant stack trace from the crash log is below :

Stack: [0x00007f5b24971000,0x00007f5b24a72000],  sp=0x00007f5b24a70290,
free space=1020k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native
C  [libzxidjni.so+0x118752]  zx_alloc+0x39
C  [libzxidjni.so+0x164b68]  zxid_init_conf+0x72
C  [libzxidjni.so+0x135a56]  zxid_conf_to_cf_len+0x106
C  [libzxidjni.so+0x1371aa]  zxid_fed_mgmt_len+0x5a
C  [libzxidjni.so+0x137222]  zxid_fed_mgmt+0x36
C  [libzxidjni.so+0xfc6ac]  Java_zxidjava_zxidjniJNI_zxid_1fed_1mgmt+0xe8



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