[shuwenwei]

Backport

Backport of #1061 to dev/1.1.

Problem

ReadWriteIOUtils assumed a single InputStream.read() call would fill the requested buffer. The InputStream contract permits partial reads, so valid data could fail with Intend to read N bytes but M are actually returned. The readAsPossible overloads also needed to distinguish zero-byte progress from EOF and avoid an extra hidden read.

Change

• Read fixed-width values and length-prefixed strings until the requested bytes are available or EOF is reached.
• Treat single-byte reader EOF as EOFException.
• Retry zero-byte TsFileInput.read() and only treat negative values as EOF.
• Remove the extra read in readAsPossible(TsFileInput, long, ByteBuffer).
• Make BytesUtils.safeReadInputStreamToBytes fail on truncated input instead of returning zero-filled data.
• Add focused fragmented-stream, truncation, EOF, and zero-read regression tests.

Compatibility

This backport keeps the dev/1.1 error-message and string-handling style and does not import develop-only i18n or unrelated refactors.

Validation

Per repository constraints, compilation and tests were not run locally. git diff --check passed.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 89.65517% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.20%. Comparing base (396fdf2) to head (2cc87dc).

Files with missing lines	Patch %	Lines
...java/org/apache/tsfile/utils/ReadWriteIOUtils.java	89.58%	5 Missing ⚠️
.../main/java/org/apache/tsfile/utils/BytesUtils.java	90.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           dev/1.1    #1066      +/-   ##
===========================================
+ Coverage    59.09%   59.20%   +0.11%     
===========================================
  Files          420      420              
  Lines        28118    28158      +40     
  Branches      3716     3727      +11     
===========================================
+ Hits         16615    16672      +57     
+ Misses       11307    11290      -17     
  Partials       196      196              

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