[to dev/1.3] Modify default heap dump path of datanode (#14061)

Author: shuwenwei

iotdb-core/datanode/src/assembly/resources/conf/datanode-env.sh

@@ -143,6 +143,48 @@ calculate_memory_sizes()
 }
 
 
+DATANODE_CONF_DIR="`dirname "$0"`"
+# find first dir of dn_data_dirs from properties file
+get_first_data_dir() {
+    local config_file="$1"
+    local data_dir_value=""
+
+    data_dir_value=`sed '/^dn_data_dirs=/!d;s/.*=//' ${DATANODE_CONF_DIR}/${config_file} | tail -n 1`
+
+    if [ -z "$data_dir_value" ]; then
+        echo ""
+        return 0
+    fi
+
+    local first_dir=""
+
+    if [[ "$data_dir_value" == *";"* ]]; then
+        first_dir=$(echo "$data_dir_value" | cut -d';' -f1)
+    fi
+    if [[ "$first_dir" == *","* ]]; then
+        first_dir=$(echo "$first_dir" | cut -d',' -f1)
+    fi
+
+    if [[ "$first_dir" == /* ]]; then
+        echo "$first_dir"
+    else
+        echo "$DATANODE_CONF_DIR/../$first_dir"
+    fi
+}
+
+if [ -f "${DATANODE_CONF_DIR}/iotdb-system.properties" ]; then
+  	heap_dump_dir=$(get_first_data_dir "iotdb-system.properties")
+else
+  	heap_dump_dir=$(get_first_data_dir "iotdb-datanode.properties")
+fi
+
+if [ -z "$heap_dump_dir" ]; then
+  	heap_dump_dir="$(dirname "$0")/../data/datanode/data/"
+fi
+if [ ! -d "$heap_dump_dir" ]; then
+  	mkdir -p "$heap_dump_dir"
+fi
+
 # find java in JAVA_HOME
 if [ -n "$JAVA_HOME" ]; then
     for java in "$JAVA_HOME"/bin/amd64/java "$JAVA_HOME"/bin/java; do
@@ -301,7 +343,7 @@ IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -XX:+SafepointTimeout"
 # IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -XX:+AlwaysPreTouch"
 
 # if you want to dump the heap memory while OOM happening, you can use the following command, remember to replace /tmp/heapdump.hprof with your own file path and the folder where this file is located needs to be created in advance
-# IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/tmp/datanode_heapdump.hprof"
+# IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=${heap_dump_dir}/datanode_heapdump.hprof"
 
 
 echo "DataNode on heap memory size = ${ON_HEAP_MEMORY}B, off heap memory size = ${OFF_HEAP_MEMORY}B"