无法在ubuntu服务器中安装rJava依赖项

我正在尝试安装一些软件包（mailR），以便能够通过邮件将错误和消息传达给我的用户，并通过rJdbc连接到HIVE服务器，但是随着步骤的完成，安装rJava依赖关系变得越来越复杂。

第一个错误是要求rJava软件包，因此我尝试安装rJava：

install.packages("rJava")

Installing package into ‘/home/joe/R/x86_64-pc-linux-gnu-library/3.6’
(as ‘lib’ is unspecified)
trying URL 'https://cran.rstudio.com/src/contrib/rJava_0.9-11.tar.gz'
Content type 'application/x-gzip' length 675188 bytes (659 KB)
==================================================
downloaded 659 KB

* installing *source* package ‘rJava’ ...
** package ‘rJava’ successfully unpacked and MD5 sums checked
** using staged installation
checking for gcc... gcc -std=gnu99
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc -std=gnu99 accepts -g... yes
checking for gcc -std=gnu99 option to accept ISO C89... none needed
checking how to run the C preprocessor... gcc -std=gnu99 -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/wait.h that is POSIX.1 compatible... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for string.h... (cached) yes
checking sys/time.h usability... yes
checking sys/time.h presence... yes
checking for sys/time.h... yes
checking for unistd.h... (cached) yes
checking for an ANSI C-conforming const... yes
checking whether time.h and sys/time.h may both be included... yes
configure: checking whether gcc -std=gnu99 supports static inline...
yes
checking whether setjmp.h is POSIX.1 compatible... yes
checking whether sigsetjmp is declared... yes
checking whether siglongjmp is declared... yes
checking Java support in R... present:
interpreter : '/usr/lib/jvm/default-java/bin/java'
archiver    : '/usr/bin/jar'
compiler    : '/usr/bin/javac'
header prep.: '/usr/bin/javah'
cpp flags   : ''
java libs   : ''
configure: error: One or more Java configuration variables are not set.
Make sure R is configured with full Java support (including JDK). Run
R CMD javareconf
as root to add Java support to R.

If you don't have root privileges, run
R CMD javareconf -e
to set all Java-related variables and then install rJava.

ERROR: configuration failed for package ‘rJava’
* removing ‘/home/jmvo/R/x86_64-pc-linux-gnu-library/3.6/rJava’
Warning in install.packages :
  installation of package ‘rJava’ had non-zero exit status

The downloaded source packages are in
    ‘/tmp/RtmpkTvmz8/downloaded_packages’

因此，我按照root用户的指示进行了操作：

sudo R CMD javareconf

Java interpreter : /usr/lib/jvm/default-java/bin/java
Java version     : 11.0.3
Java home path   : /usr/lib/jvm/default-java
Java compiler    : /usr/bin/javac
Java headers gen.: /usr/bin/javah
Java archive tool: /usr/bin/jar

trying to compile and link a JNI program 
detected JNI cpp flags    : 
detected JNI linker flags : -L$(JAVA_HOME)/lib/server -ljvm
gcc -std=gnu99 -I"/usr/share/R/include" -DNDEBUG     -fpic  -g -O2 -fdebug-prefix-map=/build/r-base-VAQCff/r-base-3.6.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -g  -c conftest.c -o conftest.o
conftest.c:1:10: fatal error: jni.h: No such file or directory
 #include 
          ^~~~~~~
compilation terminated.
/usr/lib/R/etc/Makeconf:167: recipe for target 'conftest.o' failed
make: *** [conftest.o] Error 1
Unable to compile a JNI program


JAVA_HOME        : /usr/lib/jvm/default-java
Java library path: 
JNI cpp flags    : 
JNI linker flags : 
Updating Java configuration in /usr/lib/R
Done.

我检查了是否安装了Open JDK，因为许多SO答案似乎都与缺少JDK有关。

 java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-8u212-b03-0ubuntu1.18.04.1-b03)
OpenJDK 64-Bit Server VM (build 25.212-b03, mixed mode)

可以肯定的是，尝试再次使用

sudo apt-get install openjdk-8-jdk                                                
Reading package lists... Done
Building dependency tree       
Reading state information... Done
openjdk-8-jdk is already the newest version (8u212-b03-0ubuntu1.18.04.1).
0 upgraded, 0 newly installed, 0 to remove and 74 not upgraded.

其他一些答案则建议通过apt-get这样安装rJava

 sudo apt-get install r-cran-rjava

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 r-cran-rjava : Depends: r-api-3.4
E: Unable to correct problems, you have held broken packages.o 

但是我使用的是R 3.6，因此不能选择返回。不能选择使用Oracle Java。许多可运行的应用程序都依赖于OpenJDK。

到目前为止没有成功。这是一个永无止境的过程。在此问题上尝试了许多SO答案都无济于事。我不仅需要rJava来发送邮件，还需要rJava上的许多其他过程，例如连接到Hive等等。

谢谢