将jni的入参JNIEnv赋值为全局变量

Question

我将jni调用函数中的入参JNIEnv* 赋值为全局变量，然后在另一个函数中调用，程序core掉，core文件中提示

0x0000003bc4c30265 in raise () from /lib64/libc.so.6
#1  0x0000003bc4c31d10 in abort () from /lib64/libc.so.6
#2  0x00002add620543d7 in os::abort () from /opt/jdk1.6.0_19/jre/lib/amd64/server/libjvm.so
#3  0x00002add6218d50d in VMError::report_and_die () from /opt/jdk1.6.0_19/jre/lib/amd64/server/libjvm.so
#4  0x00002add6205a4c1 in JVM_handle_linux_signal () from /opt/jdk1.6.0_19/jre/lib/amd64/server/libjvm.so
#5  0x00002add62056cfe in signalHandler () from /opt/jdk1.6.0_19/jre/lib/amd64/server/libjvm.so
#6  <signal handler called>
#7  0x00002add61e629f3 in jni_FindClass () from /opt/jdk1.6.0_19/jre/lib/amd64/server/libjvm.so
#8  0x00002aab3c3e5ef1 in JNIEnv_::FindClass (this=0x2aab3414f050, name=0x2aab3c3e8fb0 "report/dataaccess/reportservice/queryReportObject")
    at /opt/jdk1.6.0_19/include/jni.h:776
#9  0x00002aab3c3e5576 in Java_report_dataaccess_reportservice_JQueryReportServer_GetQueryReportServerResult (p_env=0x43c6a9b8, p_arg=0x41767b38

 

请各位大侠赐教！

Answer 1

Java有明确的提示，JNIEnv不要cache起来，不同线程的JNIEnv是不一样的：

http://www.cnblogs.com/lovingprince/archive/2008/08/19/2166366.html