报错：org.json.JSONException: No value for stm

07-06 21:35:58.560 I/efs.px.api( 4665): Upload file, url is https://errlog.umeng.com/perf_upload

07-06 21:35:58.732 E/efs.px.api( 4665): checkPxReturn error

07-06 21:35:58.732 E/efs.px.api( 4665): org.json.JSONException: No value for stm

07-06 21:35:58.732 E/efs.px.api( 4665): at org.json.JSONObject.get(JSONObject.java:389)

07-06 21:35:58.732 E/efs.px.api( 4665): at org.json.JSONObject.getLong(JSONObject.java:514)

07-06 21:35:58.732 E/efs.px.api( 4665): at com.efs.sdk.base.core.a.a.a(SourceFile:219)

07-06 21:35:58.732 E/efs.px.api( 4665): at com.efs.sdk.base.core.a.d.a(SourceFile:7057)

07-06 21:35:58.732 E/efs.px.api( 4665): at com.efs.sdk.base.core.util.a.e.a(SourceFile:1076)

07-06 21:35:58.732 E/efs.px.api( 4665): at com.efs.sdk.base.core.util.b.c.b(SourceFile:41)

07-06 21:35:58.732 E/efs.px.api( 4665): at com.efs.sdk.base.core.a.a.a(SourceFile:125)

07-06 21:35:58.732 E/efs.px.api( 4665): at com.efs.sdk.base.core.c.a.a(SourceFile:47)

07-06 21:35:58.732 E/efs.px.api( 4665): at com.efs.sdk.base.core.c.e.run(SourceFile:38)

07-06 21:35:58.732 E/efs.px.api( 4665): at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)

07-06 21:35:58.732 E/efs.px.api( 4665): at java.util.concurrent.FutureTask.run(FutureTask.java:237)

07-06 21:35:58.732 E/efs.px.api( 4665): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)

07-06 21:35:58.732 E/efs.px.api( 4665): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)

07-06 21:35:58.732 E/efs.px.api( 4665): at java.lang.Thread.run(Thread.java:818)

07-06 21:35:58.732 I/efs.px.api( 4665): upload result : false, resp is HttpResponse {succ=false, code=200, data='{"errors": "Unexpected Exception BLANK MESSAGE"}', extra={req_url=https://errlog.umeng.com/perf_upload, flow_limit=true, biz_code=-1, size=0, type=patrace}}