报错信息如下：
DroidDoc took 4 sec. to write docs to out/target/common/docs/apache-http-stubs-gen
[ 48% 10841/22512] Building with Jack:...http.legacy_intermediates/classes.jack
FAILED: out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/classes.jack
/bin/bash -c "(rm -f out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/classes.jack )
&& (rm -rf out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc )
&& (mkdir -p out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/ )
&& (mkdir -p out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc )
&& (rm -f out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc/java-source-list )
&& (touch out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc/java-source-list )
&& (if [ -d \"out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/src\" ];
then find out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/src -name '*.java' >>
out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc/java-source-list; fi )
&& (tr ' ' '\n' < out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc/java-source-list
| build/tools/normalize_path.py | sort -u > out/target/common/obj/JAVA_LIBRARIES/
org.apache.http.legacy_intermediates/jack-rsc/java-source-list-uniq ) &&
(if [ -s out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc/java-source-list-uniq ]
; then export tmpEcjArg=\"@out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/
jack-rsc/java-source-list-uniq\"; else export tmpEcjArg=\"\"; fi;
JACK_VERSION=4.32.CANDIDATE out/host/linux-x86/bin/jack @build/core/jack-default.args -g -D jack.java.source.version=1.7
--classpath out/target/common/obj/JAVA_LIBRARIES/sdk_v21_intermediates/classes.jack
-D jack.import.resource.policy=keep-first -D jack.import.type.policy=keep-first -D
jack.android.min-api-level=21 --output-jack out/target/common/obj/JAVA_LIBRARIES/
org.apache.http.legacy_intermediates/classes.jack $tmpEcjArg ||
( rm -f out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/classes.jack ; exit 41 ) )
&& (rm -f out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc/java-source-list )
&& (mv out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc/
java-source-list-uniq out/target/common/obj/JAVA_LIBRARIES/org.apache.http.legacy_intermediates/jack-rsc.java-source-list )"
No Jack server running. Try 'jack-admin start-server'
[ 48% 10848/22512] target Java: framew...ARIES/framework_intermediates/classes)
ninja: build stopped: subcommand failed.
21:25:15 ninja failed with: exit status 1
#### failed to build some targets (01:02:56 (hh:mm:ss)) ####
DroidDoc took 4 sec. to write 
