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HDFS-14348: Fix JNI exception handling issues in libhdfs #600

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HDFS-14348: Fix JNI exception handling issues in libhdfs #600

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06e3ca6
HDFS-14348: Fix JNI exception handling issues in libhdfs
Mar 12, 2019
264f17b
HDFS-14348: Addressing PR comments
Mar 19, 2019
0e32ef2
HDFS-14348: Addressing PR comments
Mar 21, 2019
d2b3dda
HDFS-14348: Fixing translateZCRException exception free issue
Mar 21, 2019
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54 changes: 36 additions & 18 deletions hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/hdfs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2491,18 +2491,15 @@ int hadoopRzOptionsSetByteBufferPool(
JNIEnv *env;
jthrowable jthr;
jobject byteBufferPool = NULL;
jobject globalByteBufferPool = NULL;
int ret;

env = getJNIEnv();
if (!env) {
errno = EINTERNAL;
return -1;
}

if (opts->byteBufferPool) {
// Delete any previous ByteBufferPool we had.
(*env)->DeleteGlobalRef(env, opts->byteBufferPool);
}

if (className) {
// Note: we don't have to call hadoopRzOptionsClearCached in this
// function, since the ByteBufferPool is passed separately from the
Expand All @@ -2512,17 +2509,35 @@ int hadoopRzOptionsSetByteBufferPool(
if (jthr) {
printExceptionAndFree(env, jthr, PRINT_EXC_ALL,
"hadoopRzOptionsSetByteBufferPool(className=%s): ", className);
errno = EINVAL;
return -1;
ret = EINVAL;
goto done;
}
opts->byteBufferPool = (*env)->NewGlobalRef(env, byteBufferPool);
if (!opts->byteBufferPool) {
printExceptionAndFree(env, jthr, PRINT_EXC_ALL,
// Only set opts->byteBufferPool if creating a global reference is
// successful
globalByteBufferPool = (*env)->NewGlobalRef(env, byteBufferPool);
if (!globalByteBufferPool) {
printPendingExceptionAndFree(env, PRINT_EXC_ALL,
"hadoopRzOptionsSetByteBufferPool(className=%s): ",
className);
errno = EINVAL;
return -1;
ret = EINVAL;
goto done;
}
// Delete any previous ByteBufferPool we had before setting a new one.
if (opts->byteBufferPool) {
(*env)->DeleteGlobalRef(env, opts->byteBufferPool);
}
opts->byteBufferPool = globalByteBufferPool;
} else if (opts->byteBufferPool) {
// If the specified className is NULL, delete any previous
// ByteBufferPool we had.
(*env)->DeleteGlobalRef(env, opts->byteBufferPool);
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@toddlipcon toddlipcon Mar 21, 2019

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need to also set it back to null, right?

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@sahilTakiar sahilTakiar Mar 21, 2019

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Yeah done.

}
ret = 0;
done:
destroyLocalReference(env, byteBufferPool);
if (ret) {
errno = ret;
return -1;
}
return 0;
}
Expand Down Expand Up @@ -2903,8 +2918,9 @@ hdfsGetHosts(hdfsFS fs, const char *path, tOffset start, tOffset length)
for (i = 0; i < jNumFileBlocks; ++i) {
jFileBlock =
(*env)->GetObjectArrayElement(env, jBlockLocations, i);
if ((*env)->ExceptionOccurred || !jFileBlock) {
ret = printPendingExceptionAndFree(env, PRINT_EXC_ALL,
jthr = (*env)->ExceptionOccurred(env);
if (jthr || !jFileBlock) {
ret = printExceptionAndFree(env, jthr, PRINT_EXC_ALL,
"hdfsGetHosts(path=%s, start=%"PRId64", length=%"PRId64"):"
"GetObjectArrayElement(%d)", path, start, length, i);
goto done;
Expand Down Expand Up @@ -2937,8 +2953,9 @@ hdfsGetHosts(hdfsFS fs, const char *path, tOffset start, tOffset length)
//Now parse each hostname
for (j = 0; j < jNumBlockHosts; ++j) {
jHost = (*env)->GetObjectArrayElement(env, jFileBlockHosts, j);
if ((*env)->ExceptionOccurred || jHost) {
ret = printPendingExceptionAndFree(env, PRINT_EXC_ALL,
jthr = (*env)->ExceptionOccurred(env);
if (jthr || !jHost) {
ret = printExceptionAndFree(env, jthr, PRINT_EXC_ALL,
"hdfsGetHosts(path=%s, start=%"PRId64", length=%"PRId64"): "
"NewByteArray", path, start, length);
goto done;
Expand Down Expand Up @@ -3426,8 +3443,9 @@ hdfsFileInfo* hdfsListDirectory(hdfsFS fs, const char *path, int *numEntries)
//Save path information in pathList
for (i=0; i < jPathListSize; ++i) {
tmpStat = (*env)->GetObjectArrayElement(env, jPathList, i);
if ((*env)->ExceptionOccurred || !tmpStat) {
ret = printPendingExceptionAndFree(env, PRINT_EXC_ALL,
jthr = (*env)->ExceptionOccurred(env);
if (jthr || !tmpStat) {
ret = printExceptionAndFree(env, jthr, PRINT_EXC_ALL,
"hdfsListDirectory(%s): GetObjectArrayElement(%d out of %d)",
path, i, jPathListSize);
goto done;
Expand Down
7 changes: 5 additions & 2 deletions ...project/hadoop-hdfs-native-client/src/main/native/libhdfs/os/posix/thread_local_storage.c
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,7 @@ void hdfsThreadDestructor(void *v)
struct ThreadLocalState *state = (struct ThreadLocalState*)v;
JNIEnv *env = state->env;;
jint ret;
jthrowable jthr;
char thr_name[MAXTHRID];

/* Detach the current thread from the JVM */
Expand All @@ -58,15 +59,17 @@ void hdfsThreadDestructor(void *v)
if (ret != 0) {
fprintf(stderr, "hdfsThreadDestructor: GetJavaVM failed with error %d\n",
ret);
if ((*env)->ExceptionOccurred) {
jthr = (*env)->ExceptionOccurred(env);
if (jthr) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
}
} else {
ret = (*vm)->DetachCurrentThread(vm);

if (ret != JNI_OK) {
if ((*env)->ExceptionOccurred) {
jthr = (*env)->ExceptionOccurred(env);
if (jthr) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
}
Expand Down