java.net.ProtocolException: unexpected end of stream

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#### 报错信息
`
java.net.ProtocolException: unexpected end of stream
at com.android.okhttp.internal.http.Http1xStream$FixedLengthSource.read(Http1xStream.java:398)
at com.android.okhttp.okio.RealBufferedSource$1.read(RealBufferedSource.java:372)
at java.io.InputStream.read(InputStream.java:101)
at com.liulishuo.filedownloader.download.FetchDataTask.run(FetchDataTask.java:141)
at com.liulishuo.filedownloader.download.DownloadRunnable.run(DownloadRunnable.java:121)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:929)
`
version: 1.7.7

### log
`
I/FileDownloader.FileDownloadProperties: init properties 1
load properties: http.lenient=FALSE; process.non-separate=TRUE; download.min-progress-step=65536; download.min-progress-time=2000; download.max-network-thread-count=3; file.non-pre-allocation=FALSE; broadcast.completed=FALSE; download.trial-connection-head-method=FALSE
D/FileDownloader.LostServiceConnectedHandler: Waiting for connecting with the downloader service... 902999258
D/FileDownloader.DownloadTaskHunter: free the task 902999258, when the status is 10
D/FileDownloader.FileDownloadDatabase: refreshed data count: 0 , delete data count: 0, reset id count: 0. consume 1
V/FileDownloader.FileDownloadEventPool: asyncPublishInNewThread event.service.connect.changed
V/FileDownloader.FileDownloadEventPool: publish event.service.connect.changed
D/FileDownloader.LostServiceConnectedHandler: The downloader service is connected.
V/FileDownloader.DownloadTaskHunter: call start Url[https://static.quanminshike.com/apk/lqsw/releases/com.lqsw.duowanenvelope_base_2.1.7.apk], Path[/storage/emulated/0/lqsw/download/com.lqsw.duowanenvelope_base_2.1.7.apk] Listener[com.lqsw.duowanenvelope.view.dialog.UpdateDialogFragment$updateVersion$baseDownloadTask$1@5c8a4f0], Tag[null]
V/FileDownloader.DownloadTaskHunter: the task[902999258] has been into the launch pool.
D/FileDownloader.FileDownloadMessenger: notify begin 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9
V/FileDownloader.DownloadTaskHunter: filedownloader:lifecycle:start com.liulishuo.filedownloader.DownloadTaskHunter@7e39d9e by 11
V/FileDownloader.FileDownloadList: add list in all 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 11 1
D/FileDownloader.FileDownloadManager: request start the task with url(https://static.quanminshike.com/apk/lqsw/releases/com.lqsw.duowanenvelope_base_2.1.7.apk) path(/storage/emulated/0/lqsw/download/com.lqsw.duowanenvelope_base_2.1.7.apk) isDirectory(FALSE)
D/FileDownloader.FileDownloadUtils: can't continue 902999258 file not suit, exists[FALSE], directory[FALSE]
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[11] new[1] 1
D/FileDownloader.FileDownloadMessenger: notify pending 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[1] new[6] 1
D/FileDownloader.FileDownloadMessenger: notify started 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
V/FileDownloader.ConnectTask: 902999258 add outside header: {Connection=[keep-alive]}
D/FileDownloader.ConnectTask: <---- 902999258 request header {Connection=[keep-alive], Range=[bytes=0-0], User-Agent=[FileDownloader/1.7.7]}
D/FileDownloader.ConnectTask: ----> 902999258 response header {null=[HTTP/1.1 206 Partial Content], Accept-Ranges=[bytes], Age=[0], Ali-Swift-Global-Savetime=[1596609907], Connection=[keep-alive], Content-Length=[1], Content-MD5=[dZXfX5kmZbGhkyaH96GZhw==], Content-Range=[bytes 0-0/18080792], Content-Type=[application/vnd.android.package-archive], Date=[Thu, 06 Aug 2020 09:44:28 GMT], EagleId=[7160b59e15967070687135380e], ETag=["7595DF5F992665B1A1932687F7A19987"], Last-Modified=[Wed, 05 Aug 2020 06:40:12 GMT], Server=[Tengine], Timing-Allow-Origin=[*], Vary=[Origin], Via=[cache14.l2cn1823[25,304-0,H], cache16.l2cn1823[37,0], cache16.cn1368[143,206-0,H], cache10.cn1368[148,0]], X-Android-Received-Millis=[1596707065105], X-Android-Response-Source=[NETWORK 206], X-Android-Selected-Protocol=[http/1.1], X-Android-Sent-Millis=[1596707064942], X-Cache=[HIT TCP_REFRESH_HIT dirn:13:49229437], x-oss-cdn-auth=[success], x-oss-hash-crc64ecma=[7633098847487272055], x-oss-object-type=[Normal], x-oss-request-id=[5F2BD0FC5820623232C09082], x-oss-server-time=[7], x-oss-storage-class=[Standard], X-Swift-CacheTime=[3600], X-Swift-SaveTime=[Thu, 06 Aug 2020 09:44:28 GMT]}
D/FileDownloader.FileDownloadUtils: etag find "7595DF5F992665B1A1932687F7A19987" for task(902999258)
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[6] new[2] 1
D/FileDownloader.FileDownloadMessenger: notify connected 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9
D/FileDownloader.FileDownloadUtils: can't continue 902999258 file not suit, exists[FALSE], directory[FALSE]
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
D/FileDownloader.DownloadLaunchRunnable: fetch data with multiple connection(count: [3]) for task[902999258] totalLength[18080792]
D/FileDownloader.DownloadLaunchRunnable: enable multiple connection: id[902999258] index[0] range[0, 6026929) current offset(0)
D/FileDownloader.DownloadLaunchRunnable: enable multiple connection: id[902999258] index[1] range[6026930, 12053859) current offset(6026930)
D/FileDownloader.DownloadLaunchRunnable: enable multiple connection: id[902999258] index[2] range[12053860, -1) current offset(12053860)
V/FileDownloader.ConnectTask: 902999258 add outside header: {Connection=[keep-alive]}
D/FileDownloader.ConnectTask: <---- 902999258 request header {Connection=[keep-alive], Range=[bytes=0-6026929], User-Agent=[FileDownloader/1.7.7]}
V/FileDownloader.ConnectTask: 902999258 add outside header: {Connection=[keep-alive]}
D/FileDownloader.ConnectTask: <---- 902999258 request header {Connection=[keep-alive], Range=[bytes=12053860-], User-Agent=[FileDownloader/1.7.7]}
V/FileDownloader.ConnectTask: 902999258 add outside header: {Connection=[keep-alive]}
D/FileDownloader.ConnectTask: <---- 902999258 request header {Connection=[keep-alive], Range=[bytes=6026930-12053859], User-Agent=[FileDownloader/1.7.7]}
D/FileDownloader.ConnectTask: ----> 902999258 response header {null=[HTTP/1.1 206 Partial Content], Accept-Ranges=[bytes], Age=[0], Ali-Swift-Global-Savetime=[1596609907], Connection=[keep-alive], Content-Length=[6026930], Content-MD5=[dZXfX5kmZbGhkyaH96GZhw==], Content-Range=[bytes 0-6026929/18080792], Content-Type=[application/vnd.android.package-archive], Date=[Thu, 06 Aug 2020 09:44:28 GMT], EagleId=[7160b59e15967070688826350e], ETag=["7595DF5F992665B1A1932687F7A19987"], Last-Modified=[Wed, 05 Aug 2020 06:40:12 GMT], Server=[Tengine], Timing-Allow-Origin=[*], Vary=[Origin], Via=[cache14.l2cn1823[25,304-0,H], cache16.l2cn1823[37,0], cache16.cn1368[0,206-0,H], cache10.cn1368[2,0]], X-Android-Received-Millis=[1596707065133], X-Android-Response-Source=[NETWORK 206], X-Android-Selected-Protocol=[http/1.1], X-Android-Sent-Millis=[1596707065114], X-Cache=[HIT TCP_MEM_HIT dirn:13:49229437], x-oss-cdn-auth=[success], x-oss-hash-crc64ecma=[7633098847487272055], x-oss-object-type=[Normal], x-oss-request-id=[5F2BD0FC5820623232C09082], x-oss-server-time=[7], x-oss-storage-class=[Standard], X-Swift-CacheTime=[3600], X-Swift-SaveTime=[Thu, 06 Aug 2020 09:44:28 GMT]}
D/FileDownloader.DownloadRunnable: the connection[0] for 902999258, is connected range[0, 6026929) current offset[0] with code[206]
D/FileDownloader.FetchDataTask: start fetch(0): range [0, 6026929), seek to[0]
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress update model's status with progress
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[2] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 6105 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
D/FileDownloader.FetchDataTask: require flushAndSync id[902999258] index[0] offset[66857], consume[2]
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 193429 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 370508 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 550608 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
D/FileDownloader.ConnectTask: ----> 902999258 response header {null=[HTTP/1.1 206 Partial Content], Accept-Ranges=[bytes], Age=[1], Ali-Swift-Global-Savetime=[1596609907], Connection=[keep-alive], Content-Length=[6026930], Content-MD5=[dZXfX5kmZbGhkyaH96GZhw==], Content-Range=[bytes 6026930-12053859/18080792], Content-Type=[application/vnd.android.package-archive], Date=[Thu, 06 Aug 2020 09:44:28 GMT], EagleId=[7160b5a115967070691813127e], ETag=["7595DF5F992665B1A1932687F7A19987"], Last-Modified=[Wed, 05 Aug 2020 06:40:12 GMT], Server=[Tengine], Timing-Allow-Origin=[*], Vary=[Origin], Via=[cache14.l2cn1823[25,304-0,H], cache16.l2cn1823[37,0], cache16.cn1368[0,206-0,H], cache13.cn1368[2,0]], X-Android-Received-Millis=[1596707065448], X-Android-Response-Source=[NETWORK 206], X-Android-Selected-Protocol=[http/1.1], X-Android-Sent-Millis=[1596707065220], X-Cache=[HIT TCP_MEM_HIT dirn:13:49229437], x-oss-cdn-auth=[success], x-oss-hash-crc64ecma=[7633098847487272055], x-oss-object-type=[Normal], x-oss-request-id=[5F2BD0FC5820623232C09082], x-oss-server-time=[7], x-oss-storage-class=[Standard], X-Swift-CacheTime=[3600], X-Swift-SaveTime=[Thu, 06 Aug 2020 09:44:28 GMT]}
D/FileDownloader.DownloadRunnable: the connection[1] for 902999258, is connected range[6026930, 12053859) current offset[6026930] with code[206]
D/FileDownloader.FetchDataTask: start fetch(1): range [6026930, 12053859), seek to[6026930]
D/FileDownloader.ConnectTask: ----> 902999258 response header {null=[HTTP/1.1 206 Partial Content], Accept-Ranges=[bytes], Age=[1], Ali-Swift-Global-Savetime=[1596609907], Connection=[keep-alive], Content-Length=[6026932], Content-MD5=[dZXfX5kmZbGhkyaH96GZhw==], Content-Range=[bytes 12053860-18080791/18080792], Content-Type=[application/vnd.android.package-archive], Date=[Thu, 06 Aug 2020 09:44:28 GMT], EagleId=[7160b59f15967070691852558e], ETag=["7595DF5F992665B1A1932687F7A19987"], Last-Modified=[Wed, 05 Aug 2020 06:40:12 GMT], Server=[Tengine], Timing-Allow-Origin=[*], Vary=[Origin], Via=[cache14.l2cn1823[25,304-0,H], cache16.l2cn1823[37,0], cache16.cn1368[0,206-0,H], cache11.cn1368[1,0]], X-Android-Received-Millis=[1596707065449], X-Android-Response-Source=[NETWORK 206], X-Android-Selected-Protocol=[http/1.1], X-Android-Sent-Millis=[1596707065225], X-Cache=[HIT TCP_MEM_HIT dirn:13:49229437], x-oss-cdn-auth=[success], x-oss-hash-crc64ecma=[7633098847487272055], x-oss-object-type=[Normal], x-oss-request-id=[5F2BD0FC5820623232C09082], x-oss-server-time=[7], x-oss-storage-class=[Standard], X-Swift-CacheTime=[3600], X-Swift-SaveTime=[Thu, 06 Aug 2020 09:44:28 GMT]}
D/FileDownloader.DownloadRunnable: the connection[2] for 902999258, is connected range[12053860, -1) current offset[12053860] with code[206]
D/FileDownloader.FetchDataTask: start fetch(2): range [12053860, -1), seek to[12053860]
D/FileDownloader.FetchDataTask: require flushAndSync id[902999258] index[2] offset[12057956], consume[5]
D/FileDownloader.FetchDataTask: require flushAndSync id[902999258] index[1] offset[6031026], consume[2]
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 734096 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 1000336 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 1192848 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 1373072 18080792
.
.
省略中间部分
.
.
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 14966148 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
D/FileDownloader.FetchDataTask: require flushAndSync id[902999258] index[1] offset[12053860], consume[3]
D/FileDownloader.DownloadLaunchRunnable: the connection has been completed(1): [6026930, 12053859) 18080792
D/FileDownloader.FetchDataTask: require flushAndSync id[902999258] index[0] offset[3090128], consume[4]
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 15156278 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
D/FileDownloader.FetchDataTask: require flushAndSync id[902999258] index[0] offset[3159760], consume[4]
I/FileDownloader.DownloadStatusCallback: inspectNeedCallbackToUser need callback to user
I/FileDownloader.DownloadStatusCallback: handleProgress notify user progress status
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[3] 1
D/FileDownloader.FileDownloadMessenger: notify progress 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 15336502 18080792
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
D/FileDownloader.FetchDataTask: require flushAndSync id[902999258] index[0] offset[3413712], consume[5]
D/FileDownloader.DownloadLaunchRunnable: finish sub-task for [902999258] TRUE FALSE
I/chatty: uid=10390(com.lqsw.duowanenvelope) FileDownloader- identical 1 line
D/FileDownloader.DownloadLaunchRunnable: finish sub-task for [902999258] TRUE FALSE
D/FileDownloader.MessageSnapshotGate: ~~~callback 902999258 old[3] new[-1] 1
V/FileDownloader.FileDownloadList: remove 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 left -1 0
D/FileDownloader.FileDownloadMessenger: notify error 902999258@com.liulishuo.filedownloader.DownloadTask@622dfd9 java.net.ProtocolException: unexpected end of stream
V/FileDownloader.DownloadTaskHunter: filedownloader:lifecycle:over com.liulishuo.filedownloader.DownloadTaskHunter@7e39d9e by -1
D/FileDownloader.MessageSnapshotGate: updateKeepFlow
W/FileDownloader.FileDownloader: request pause but not exist 902999258

`
不是必现，但在一台Android手机上复现几率达90%，基本都是一样的问题，下载一部分就不下载了，然后就任务失败了。别的手机暂时没发现这个问题。
看了很多人的帖子，什么添加Header都没有用，issues里感觉都没人解决这个问题，基本都是说服务端问题，文件是在阿里云上的，[文件地址](https://static.quanminshike.com/apk/lqsw/releases/com.lqsw.duowanenvelope_base_2.1.7.apk)
，求大佬帮忙看看，该怎么处理。

Start by tracing the logged failure through com.android.okhttp.internal.http.Http1xStream, FetchDataTask.java, and DownloadRunnable.java, using the logged URL and multi-connection ranges. Compare the response Content-Length and Content-Range values with the read offsets; the issue does not define a desired fix or acceptance condition.

Written by the indexing model from the issue text.